The SilencerCo Delta O-Ring Pack AC87 provides factory replacement O-rings for compatible SilencerCo rimfire suppressors including the Sparrow, Spectre II and Warlock.
These small sealing components perform an important job inside the suppressor. Depending on the model and location, SilencerCo uses O-rings to help retain components, seal sections of the suppressor and limit the amount of fouling that migrates into areas where it does not belong.
The AC87 pack contains four high-temperature Viton O-rings: two #13 O-rings and two #18 O-rings.
Rimfire suppressors live in a particularly dirty environment. .22 LR ammunition produces substantial carbon, powder residue and lead fouling, and the O-rings inside compatible SilencerCo suppressors are exposed to repeated heat cycles, cleaning and disassembly.
SilencerCo notes that O-rings should be replaced when they become dried out, excessively worn, warped or otherwise deformed. Keeping an AC87 pack with your cleaning supplies prevents a damaged O-ring from sidelining the suppressor while you wait for a replacement.
The Delta O-Ring Pack uses Viton fluoroelastomer, a material well suited to suppressor use because of its resistance to heat and chemical exposure. SilencerCo explains that Viton retains its shape and sealing ability at elevated temperatures and also holds up well when exposed to common firearm lubricants and oils.
That does not make the O-rings permanent. They remain normal wear items and should be inspected during suppressor cleaning and maintenance.
Each AC87 package contains:
These are factory-sized replacement components rather than a generic hardware-store assortment. Using the correct size and material helps maintain the fit and sealing characteristics intended by SilencerCo.
SilencerCo currently specifies the Delta O-Ring Pack for:
SilencerCo's current product page identifies AC87 specifically for these models. This is not advertised as a universal O-ring kit for every SilencerCo suppressor.
When the suppressor is disassembled for normal maintenance, inspect the O-rings for flattening, cracking, cuts, swelling, hardening or other deformation.
SilencerCo advises against exposing suppressor O-rings to harsh solvents because some chemicals can degrade the elastomer and shorten service life. Follow the cleaning and lubrication instructions in the owner's manual for the specific suppressor.
SilencerCo also notes that O-rings serve different functions depending on their location. In the Sparrow, for example, O-rings around the core help seal the internal half-pipe structure and reduce fouling migration between the core and outer tube.
The Delta O-Ring Pack is exactly the kind of maintenance part that is easy to ignore until one is damaged or lost during cleaning. Keeping a factory AC87 pack with your suppressor tools or cleaning kit gives you the correct replacements on hand before you need them.
Shop more SilencerCo parts and suppressor accessories at Huckleberry Arms: SilencerCo | SilencerCo Suppressor Accessories | Silencers & Suppressors
The SilencerCo Delta Adapter AC3 is a 1/2x28-to-1/2x28 O-ring engagement adapter for compatible SilencerCo rimfire suppressors using the Delta accessory interface. Its purpose is not to convert one thread pitch to another. Instead, it changes the effective engagement length of a .6-inch 1/2x28 muzzle thread to .4 inch while adding SilencerCo's O-ring engagement arrangement.
That matters because proper suppressor seating depends on more than thread pitch. Thread length, shoulder geometry, bore clearance, and the suppressor's intended mounting interface all have to work together. AC3 is the correct option when the host barrel is 1/2x28 and the compatible Delta suppressor setup calls for the 1/2x28 O-ring engagement adapter.
The name can be misleading because both sides use 1/2x28 threads. AC3 does not change a 1/2x28 barrel into a different thread pitch. It shortens the usable .6-inch exposed thread length to .4 inch and provides the O-ring engagement used by the Delta mounting system.
The O-ring arrangement is intended to help keep muzzle threads cleaner and help prevent the suppressor from loosening during firing. It is still essential to confirm that the suppressor seats properly, the host barrel has appropriate support behind the threads, and the complete system is correctly aligned before firing.
AC3 is part of SilencerCo's Delta accessory family for compatible rimfire suppressors. It is intended for use with the SilencerCo Switchback 22, Sparrow 22, Spectre 22, Warlock 22, and Osprey Micro 22 when the firearm host and selected suppressor configuration call for this 1/2x28 Delta adapter.
It is not a HUB / Bravo, Charlie, ASR, Alpha, or direct-thread mount for centerfire suppressors. It should also not be used as a generic solution for every firearm with 1/2x28 threads. Select the adapter around the actual suppressor interface, host-thread length, and firearm configuration.
Verify that the barrel is truly threaded 1/2x28, not 1/2x20 or a proprietary metric thread. SilencerCo offers other Delta adapters for hosts such as the Walther P22, SIG Mosquito, FN Five-seveN, GSG 1911-22LR, and S&W M&P 22 Compact. Those are not interchangeable with AC3.
Before firing, confirm correct suppressor fitment, unobstructed bore clearance, muzzle-thread condition, and manufacturer guidance for the firearm and suppressor being used. The adapter does not replace proper installation, alignment verification, or safe suppressor-use procedures.
AC3 is the right choice for an owner of a 1/2x28-threaded rimfire host who is using a compatible SilencerCo Delta-interface suppressor and needs the .6-inch-to-.4-inch O-ring engagement arrangement. It is especially useful for keeping a dedicated rimfire host configured correctly instead of relying on improvised spacers or an adapter intended for another firearm.
The Aero Precision APRS100009C LAHAR-30 Direct Thread Adapter is a 1/2x28 direct-thread suppressor mount for compatible host firearms and Aero Precision LAHAR-30 suppressors. It allows a compatible LAHAR-30 suppressor to mount directly to a 1/2x28 threaded barrel without using a quick-detach muzzle device.
Aero Precision lists this adapter as compatible with 1/2x28 muzzle threads and states that it works with all LAHAR-30 suppressors. The nitride finish provides a durable black surface for hard-use suppressor setups.
Direct Thread Simplicity: Direct-thread mounting is a simple, compact mounting method for shooters who want fewer parts between the host firearm and the suppressor. It is commonly used on dedicated suppressor hosts, lightweight builds, and setups where a quick-detach muzzle device is not needed.
1/2x28 Host Compatibility: The 1/2x28 thread pitch is common on many 5.56 NATO, .223 Remington, .22 caliber, and some 9mm threaded barrels. Always confirm your firearm’s actual barrel thread pitch, caliber, shoulder geometry, and bore clearance before installation.
LAHAR-30 Suppressor Compatibility: Aero Precision states this direct thread adapter works with all LAHAR-30 suppressors. The LAHAR-30 mounting system uses industry-standard 1-3/8x24 TPI rear threads, allowing use with compatible direct-thread adapters and other approved mounting systems.
Important Fitment Note: Always confirm suppressor model compatibility, rear mount interface, barrel thread pitch, caliber, bore clearance, host firearm type, shoulder geometry, torque requirements, and alignment before installation or live fire.
Related Gear: Browse more Aero Precision products, shop additional silencer direct thread mounts, or view compatible silencer mounts and adapters.
For compatible fixed-barrel host firearms only. Do not use on pistols with unlocking or moving barrels.
The SilencerCo AC633 Alpha Direct Thread Mount is a 1/2x28 direct thread suppressor adapter for compatible SilencerCo Alpha mounting systems. It allows a compatible suppressor to attach directly to a fixed threaded barrel without using a quick-detach muzzle device.
SilencerCo describes Alpha Direct Thread Mounts as a simple mounting solution that can shorten the overall suppressor setup compared to an ASR mount. This makes the AC633 useful for compatible fixed-barrel hosts where a compact direct-thread setup is preferred.
1/2x28 Direct Thread Mount: The AC633 model uses 1/2x28 barrel threads, a common thread pitch found on many 9mm, .22 caliber, and smaller-bore threaded host firearms. Always confirm your actual barrel thread pitch, caliber, and suppressor compatibility before ordering or installing.
Alpha Mount Compatibility: SilencerCo lists Alpha Direct Thread Mount compatibility with fixed rifle barrels on the Spectre 9, Omega K Series, and Alpha MAAD Brake. Some dealer references also associate AC633 with compatible Omega K, Octane, and Harvester 300 configurations; always confirm the exact suppressor model and mount interface before use.
Not for Unlocking or Moving-Barrel Pistols: SilencerCo warns this thread mount is not for use on pistols with unlocking or moving barrels. Tilting-barrel semi-automatic pistols generally require the correct piston and booster/Nielsen device setup instead of a direct thread mount.
Important Fitment Note: Always confirm suppressor model compatibility, Alpha mount interface, barrel thread pitch, caliber, bore clearance, host firearm action type, shoulder geometry, torque requirements, and alignment before installation or live fire.
Related Gear: Browse more SilencerCo products, shop additional silencer direct thread mounts, or view compatible silencer mounts and adapters.
The SilencerCo AC822 Alpha Direct Thread Mount is a 9/16x24 RH direct thread suppressor adapter for compatible SilencerCo Alpha mounting systems. It allows a compatible suppressor to attach directly to a fixed threaded barrel without using a quick-detach muzzle device.
SilencerCo describes Alpha Direct Thread Mounts as a simple mounting solution that can shorten the overall suppressor setup compared to an ASR mount. This makes the AC822 useful for compatible fixed-barrel hosts where a compact direct-thread setup is preferred.
9/16x24 RH Direct Thread Mount: The AC822 model uses 9/16x24 right-hand barrel threads. Always confirm your actual barrel thread pitch, thread direction, caliber, and suppressor compatibility before ordering or installing.
Alpha Mount Compatibility: SilencerCo lists Alpha Direct Thread Mount compatibility with fixed rifle barrels on the Spectre 9, Omega K Series, and Alpha MAAD Brake. Some dealer references also associate AC822 with compatible Omega K, Octane, and Harvester 300 configurations; always confirm the exact suppressor model and mount interface before use.
Important Fitment Note: Always confirm suppressor model compatibility, Alpha mount interface, barrel thread pitch, thread direction, caliber, bore clearance, host firearm action type, shoulder geometry, torque requirements, and alignment before installation or live fire.
The Dead Air Armament Xeno Xero DA127 is a lightweight, minimalist 1/2x28 threaded taper-mount muzzle device with a 9mm through bore. It is built for shooters who want a compact Xeno mounting option without the added length or profile of a brake or flash hider.
The Xeno Xero gives compatible suppressors a repeatable taper-mount interface while keeping the host rifle or carbine streamlined. The shorter size reduces how far the muzzle device extends into the suppressor blast chamber, helping reduce overall weight while supporting consistent lock-up and return-to-zero performance.
Minimalist Xeno Mount: The DA127 Xeno Xero is not a muzzle brake or flash hider. It is a compact threaded taper mount for use with Dead Air Xeno adapters and compatible suppressors.
1/2x28 Thread Pitch with 9mm Bore: This DA127 model uses 1/2x28 barrel threads and is bored for 9mm and smaller projectiles. It may be useful for compatible 9mm PCCs, carbines, and other properly threaded hosts where Xeno mounting is desired.
4140 HT Steel and Black Nitride Finish: Dead Air uses heat-treated 4140 alloy steel with a black nitride finish for durability, corrosion resistance, surface hardness, and easier cleaning after suppressor use.
Xeno System Advantages: The Xeno system uses a large taper, left-hand suppressor interface threads, and accessible tool features to support repeatable mounting, hard-use durability, and easier removal.
Important Fitment Note: This DA127 model has 1/2x28 barrel threads and a 9mm bore. Always confirm barrel thread pitch, projectile diameter, suppressor compatibility, Xeno adapter compatibility, and bore alignment before installation or suppressor use.
Related Gear: Browse more muzzle devices, shop additional silencer accessories and suppressor mounts, or pair your compatible host with 9mm Ammo.
The SilencerCo Bravo Direct Thread Mount AC1340 provides a lightweight and highly secure method of attaching a suppressor directly to a firearm barrel threaded 5/8x24. Designed for suppressors utilizing the Bravo/HUB 1.375x24 rear thread pattern, this mount eliminates the additional weight, complexity, and cost associated with quick-detach mounting systems.
Many shooters prefer direct-thread mounting for precision rifles, hunting rifles, and dedicated suppressor hosts because it minimizes moving parts while maintaining a simple and repeatable suppressor attachment method. The Bravo Direct Thread Mount threads directly into compatible suppressors and interfaces with common 5/8x24 threaded barrels used on many .30 caliber rifles and larger bore platforms.
The Bravo mounting standard has become one of the most widely adopted suppressor interfaces in the industry. This gives the AC1340 compatibility with numerous SilencerCo suppressors as well as many HUB-compatible suppressors from other manufacturers. Whether you are configuring a precision rifle, hunting rifle, or dedicated suppressed firearm, the Bravo Direct Thread Mount offers a lightweight and dependable solution.
For shooters seeking maximum simplicity, reduced weight, and a secure suppressor attachment system, the SilencerCo Bravo Direct Thread Mount remains one of the most practical suppressor mounting options available.
The AAC Blackout SR-105453 is a suppressor-mount flash hider for compatible .30-caliber rifles with 5/8x24 muzzle threads. It provides flash-hider functionality when the suppressor is removed while placing AAC’s modern mounting interface directly on the host firearm.
The .30-caliber bore and common 5/8x24 barrel thread make it suitable for properly configured .308 Winchester, 7.62 NATO and .300 Blackout hosts. Always verify the firearm’s actual muzzle thread, bore clearance and shoulder geometry before installation.
The suppressor side of the device uses AAC’s modern 1x16 left-hand threaded taper interface. As the compatible suppressor mount threads onto the flash hider, the mating taper surfaces provide secure, repeatable alignment and lockup.
AAC designed this system for suppressed firing schedules involving repeated installation, removal and heat cycles. The threaded taper arrangement does not depend on the toothed ratchets or retaining latches found on older AAC mounting systems.
SR-105453 is not an AAC 51T or 90T muzzle device. Suppressors and adapters made exclusively for those legacy latch systems will not attach to this 1x16LH taper mount.
Before ordering, confirm that the suppressor already has AAC’s matching 1x16LH interface or can accept the appropriate AAC HUB mount. Matching the manufacturer alone is not enough because AAC has produced several mechanically different mounting systems.
A compatible HUB-pattern suppressor can use this muzzle device when fitted with AAC’s matching 1x16LH HUB Mount. The HUB mount installs in a suppressor with the industry-standard 1.375x24 rear interface and provides the female 1x16LH threads and mating taper required by this flash hider.
The flash hider does not attach directly to every HUB suppressor without that compatible mount. The suppressor must also be rated for the cartridge, barrel length and intended firing schedule.
Install the muzzle device only on an unloaded firearm with compatible 5/8x24 muzzle threads and adequate bore clearance. Follow AAC’s current flash-hider installation instructions and use only the installation components, thread treatment and procedures authorized by the manufacturer.
Suppressor alignment should be checked before firing with a suppressor attached, especially after installing a new muzzle device or changing host firearms. If thread condition, shoulder geometry or alignment is uncertain, installation should be completed or inspected by a qualified gunsmith.
This model is intended for someone building around AAC’s current threaded taper ecosystem on a .30-caliber host. It is a logical choice for a compatible AAC suppressor or a HUB-pattern suppressor equipped with AAC’s 1x16LH HUB Mount.
Someone using an AAC 51T, 90T or another manufacturer’s proprietary mounting system should select the muzzle device made specifically for that interface instead.
The AAC Blackout SR-105452 is a suppressor-mount flash hider for compatible 5.56 NATO and .223 Remington rifles with 1/2x28 muzzle threads. It provides flash-hider functionality when the suppressor is removed while placing AAC’s modern mounting interface directly on the host firearm.
The 5.56mm bore and common 1/2x28 barrel thread make this model a natural fit for properly configured AR-15 rifles, short-barreled rifles and other compatible 5.56 or .223 hosts. Always verify the firearm’s actual muzzle thread, bore clearance and shoulder geometry before installation.
SR-105452 is not an AAC 51T or 90T muzzle device. Suppressors and adapters made exclusively for those legacy latch systems will not attach to this 1x16LH taper mount.
The flash hider does not attach directly to every HUB suppressor without that compatible mount. The suppressor must also be rated for 5.56 NATO or .223 Remington, the host firearm’s barrel length and the intended firing schedule.
Install the muzzle device only on an unloaded firearm with compatible 1/2x28 muzzle threads and adequate bore clearance. Follow AAC’s current flash-hider installation instructions and use only the installation components, thread treatment and procedures authorized by the manufacturer.
This model is intended for someone building around AAC’s current threaded taper ecosystem on a 5.56 NATO or .223 Remington host. It is a logical choice for a compatible AAC suppressor or a HUB-pattern suppressor equipped with AAC’s 1x16LH HUB Mount.
The SilencerCo AC25 Piston is a 1/2x28 piston for compatible SilencerCo pistol suppressors and 9mm threaded pistol hosts. Pistons allow a pistol suppressor to be adapted to the thread pitch of the host firearm while working as part of the suppressor’s Nielsen device / booster system.
SilencerCo pistons are built from 17-4 stainless steel and heat-treated for durability. In a semi-automatic pistol suppressor setup, the piston is part of the moving booster assembly that helps the pistol cycle properly with the added mass of a suppressor attached to the barrel.
The AC25 is the common 1/2x28 piston used for many 9mm threaded pistol barrels. It is a useful part to keep on hand when setting up a compatible SilencerCo pistol suppressor across different 9mm hosts, or when replacing an existing piston with the same thread pattern.
Compatibility note: Always confirm suppressor, piston, barrel thread, shoulder, and host firearm compatibility before use. This is the standard 1/2x28 AC25 piston, not the 1/2x28 XL piston and not the 1/2x28 SN piston.
Shop more SilencerCo suppressor parts and accessories at Huckleberry Arms: SilencerCo | SilencerCo Muzzle Devices | SilencerCo Mounts & Adapters | SilencerCo Silencers
The SilencerCo AC2604 3-Lug Muzzle Device adds a quick-attach 9mm 3-lug interface to compatible fixed-barrel firearms with 1/2x28 muzzle threads.
Rather than threading a suppressor directly onto the barrel each time it is installed, the AC2604 remains attached to the host firearm and provides the three-lug geometry used by a compatible 9mm 3-lug suppressor mount.
This type of setup is particularly useful on pistol-caliber carbines, subgun-style firearms and other fixed-barrel 9mm platforms where the suppressor may be installed and removed frequently.
SilencerCo manufactures several 3-lug muzzle-device variations for different thread pitches and calibers. This listing is specifically for:
SilencerCo's current lineup also includes 1/2x36, 5/8x24 and metric-thread 9mm configurations as well as separate .45-caliber 3-lug muzzle devices. Verify the exact barrel thread before ordering.
AC2604 must be paired with a compatible 9mm 3-lug suppressor mount.
SilencerCo specifically states that its 9mm 3-lug muzzle devices must only be used with 9mm 3-lug mounts. The separate .45-caliber 3-lug system uses different dimensions and should not be mixed with this component.
The corresponding SilencerCo suppressor-side mount is the 9mm 3-Lug Mount, such as AC2447 where appropriate for the suppressor configuration.
SilencerCo describes the 3-lug system as a quick-attach mounting solution for firearms with fixed barrels.
Typical applications include:
A conventional recoil-operated handgun with a tilting barrel generally uses an appropriate piston / booster system instead of a rigid 3-lug configuration unless the suppressor and firearm manufacturers specifically approve another arrangement.
Once the firearm is equipped with a proper 3-lug muzzle device and the suppressor has the matching 3-lug mount installed, the system allows quick attachment and removal without repeatedly threading the suppressor directly onto the barrel.
For a dedicated 9mm PCC or subgun-style host, this keeps the muzzle interface compact and makes moving a compatible suppressor on and off the firearm considerably more convenient.
SilencerCo currently lists its 3-lug system for compatible configurations within several suppressor families, including:
Compatibility ultimately depends on both sides of the system: the firearm must have the correct AC2604-compatible 9mm muzzle interface, and the suppressor must be configured with the appropriate 9mm 3-lug mount and any required mounting housing.
Although 1/2x28 is common on American-made 9mm barrels, it is not universal. Some 9mm platforms use 1/2x36, M13.5x1 LH or other thread specifications.
Verify the actual barrel thread, caliber, muzzle shoulder geometry and suppressor system before ordering.
The appeal of a 3-lug system is simplicity. Instead of leaving exposed barrel threads or repeatedly installing a direct-thread suppressor, the AC2604 gives the firearm a permanent compact mounting interface designed around fast suppressor attachment.
For shooters already using SilencerCo's 9mm 3-lug ecosystem, AC2604 is the factory option for a compatible 1/2x28 9mm fixed-barrel host.
Shop related SilencerCo products: SilencerCo | Suppressor Muzzle Devices | SilencerCo Suppressor Accessories
Requires a compatible 9mm 3-lug suppressor mount for suppressor attachment.
The SilencerCo AC2609 3-Lug Muzzle Device is a 5/8x24 threaded 9mm muzzle device for compatible fixed-barrel hosts. It threads onto the barrel and provides a 3-lug interface for quick suppressor attachment when used with the correct 9mm 3-lug mount.
SilencerCo describes the 3-lug system as a quick-attach mounting option for guns with fixed barrels. This mounting setup is commonly used on pistol-caliber carbines, subguns, and other compatible fixed-barrel 9mm hosts where fast suppressor attachment and removal are desired.
5/8x24 9mm 3-Lug Muzzle Device: The AC2609 model uses 5/8x24 barrel threads and is intended for compatible 9mm hosts. Always confirm your barrel thread pitch, bore clearance, and suppressor mounting system before ordering or installing.
9mm 3-Lug Mount Required: SilencerCo notes that 9mm 3-lug muzzle devices must only be used with 9mm 3-lug mounts. The muzzle device is only one side of the system; the suppressor must also have the compatible 3-lug mount installed.
Fixed-Barrel Host Use: 3-lug muzzle devices are intended for fixed-barrel host firearms. Do not use a 3-lug mount as a replacement for a booster/piston system on a tilting-barrel semi-automatic handgun unless the suppressor manufacturer specifically approves the configuration.
Important Fitment Note: Always confirm barrel thread pitch, caliber, bore clearance, suppressor compatibility, 3-lug mount compatibility, host firearm action type, shoulder geometry, torque requirements, and alignment before installation or live fire.
Related Gear: Browse more SilencerCo products, shop additional silencer muzzle devices, or pair your compatible host with 9mm Ammo.
The SilencerCo AC31 Piston is a 9/16x24 suppressor piston for compatible SilencerCo pistol suppressor systems. It allows the suppressor to interface with host firearms using the 9/16x24 barrel thread pattern.
SilencerCo pistons are designed to be swapped for different host firearms, calibers, and barrel thread patterns. They are made from 17-4 stainless steel and heat treated for durability under repeated suppressor mounting and cycling use.
9/16x24 Thread Pattern: The AC31 piston is the 9/16x24 version. This thread pitch is commonly associated with select .40 S&W and other compatible threaded pistol barrels, but thread pitch should always be verified on the actual host firearm before ordering.
Nielsen Device Component: A piston is part of the booster/Nielsen device system that allows many semi-automatic tilting-barrel pistols to cycle properly with the added weight of a suppressor attached.
For Compatible SilencerCo Suppressor Systems: SilencerCo pistons are commonly used with compatible pistol suppressor families such as Osprey, Octane, Omega K, Hybrid 46/46M, and Omega 36M configurations when the correct piston mount or booster assembly is used. Always confirm compatibility with your exact suppressor model before ordering.
Fixed-Barrel Host Note: Pistons and boosters are generally used on tilting-barrel semi-automatic pistols. For fixed-barrel hosts, use the correct fixed-barrel spacer, fixed mount, or manufacturer-recommended mounting configuration for your suppressor and firearm setup.
Important Fitment Note: This AC31 model is the 9/16x24 piston. Always confirm barrel thread pitch, suppressor compatibility, host firearm action type, piston family, bore alignment, and manufacturer instructions before installation or live fire.
Related Gear: Browse more SilencerCo products, shop additional silencer pistons and boosters, or pair your compatible host with 9mm Ammo.
The SilencerCo AC2607 3-Lug Muzzle Device is a 1/2x36 threaded 9mm muzzle device for compatible fixed-barrel hosts. It threads onto the barrel and provides a 3-lug interface for quick suppressor attachment when used with the correct 9mm 3-lug mount.
SilencerCo describes the 3-lug system as a quick-attach mounting option for guns with fixed barrels. This type of mounting setup is commonly used on pistol-caliber carbines, subguns, and other compatible fixed-barrel 9mm hosts where fast suppressor attachment and removal are desired.
1/2x36 9mm 3-Lug Muzzle Device: The AC2607 model uses 1/2x36 barrel threads and is intended for compatible 9mm hosts. Always confirm your barrel thread pitch, bore clearance, and suppressor mounting system before ordering or installing.
The SilencerCo AC626 Piston is an M13.5x1 LH XL suppressor piston for compatible SilencerCo pistol suppressor setups. The XL length is intended for firearms where the silencer requires additional clearance between the threaded barrel and the suppressor.
SilencerCo pistons are designed to be changed out for different host firearms, calibers, and barrel thread patterns. This AC626 piston uses M13.5x1 left-hand metric threads, a common European-style pistol thread pattern used on select threaded pistol barrels.
XL Length for Extra Clearance: SilencerCo notes that XL pistons are for firearms where additional length is required between the threaded barrel and the silencer. This can matter on certain hosts where standard-length pistons do not provide the needed clearance.
Booster / Nielsen Device Component: A piston is part of the booster assembly that allows many semi-automatic tilting-barrel pistols to cycle properly with the added weight of a suppressor. For fixed-barrel hosts, use the appropriate fixed-barrel spacer or fixed-mount configuration recommended by SilencerCo.
Durable Construction: SilencerCo pistons are commonly listed as heat-treated 17-4 stainless steel, giving the part durability for repeated suppressor mounting and cycling use.
Important Fitment Note: This AC626 model is the M13.5x1 LH XL piston. Always confirm your barrel thread pitch, left-hand thread direction, piston length requirement, suppressor compatibility, host action type, and bore alignment before installation or live fire.
Related Gear: Browse more SilencerCo products, shop additional silencer accessories and suppressor mounts, or pair your compatible host with 9mm Ammo.
The SilencerCo AC26 Piston is the standard-length M13.5x1 LH piston for compatible 9mm pistols using a recoil-operated tilting or unlocking barrel.
The piston threads onto the host pistol barrel and becomes part of the suppressor's Nielsen device / recoil-booster system. That booster assembly allows the barrel and slide to move correctly during the firing cycle while supporting the added mass of the suppressor.
SilencerCo lists AC26 specifically for factory-threaded H&K, SIG and Glock 9mm barrels using the M13.5x1 LH metric thread pattern. Always verify the actual barrel thread before ordering, as manufacturers have used different thread patterns across models and production runs.
This listing is specifically for SilencerCo part number AC26:
Do not confuse AC26 with AC626, which is SilencerCo's extended-length M13.5x1 LH piston for specific applications such as the SIG MPX with an Osprey and certain Beretta 92FS/M9 metric-barrel setups.
SilencerCo describes its pistons as components of the Nielsen device used on pistols with unlocking barrels.
In a conventional recoil-operated semiautomatic pistol, adding a suppressor directly to the barrel creates enough additional mass that reliable cycling can become difficult. The spring-loaded booster assembly allows the suppressor body to momentarily move independently of the barrel during recoil, helping the pistol complete its normal operating cycle.
The piston is therefore not merely a thread adapter. It is a functional component of the suppressor's recoil system.
SilencerCo manufactures its pistons from 17-4 stainless steel and heat-treats them for durability.
The piston experiences repeated mechanical movement, heat and carbon fouling every time the suppressor is fired, so strength and dimensional consistency are important to reliable booster operation and proper barrel engagement.
SilencerCo's current piston guide lists its pistons as compatible with the following suppressor families when the suppressor is configured with the appropriate piston housing:
Some suppressors require an additional piston-mount housing before a piston can be installed. For example, modular rifle / pistol suppressors such as the Hybrid 46M and Omega 36M use the appropriate Charlie piston-mount configuration, while other suppressor families use their own piston housings.
Verify the suppressor model and mounting configuration before assuming the piston alone completes the installation.
SilencerCo's metric centerfire pistol thread specification is different from the conventional square-shoulder arrangement commonly encountered with many inch-pattern barrel threads.
SilencerCo specifies that its metric centerfire pistol accessories, including the M13.5x1 LH AC26 piston, shoulder against the nose of the barrel threads. Correct barrel geometry is therefore important for proper seating and alignment.
This is another reason to verify that the threaded barrel was manufactured to the correct suppressor-ready specification rather than relying only on the thread-pitch marking.
The LH designation means the piston uses a left-hand thread. Installation and removal therefore turn in the opposite direction from a conventional right-hand thread.
M13.5x1 LH has historically been common on European-pattern 9mm threaded barrels and has been used on factory suppressor-ready pistols from manufacturers including H&K, SIG and Glock.
SilencerCo specifically warns that its pistol pistons are intended for pistol-caliber applications. They should not be used as a mounting method for rifle cartridges such as 5.56 NATO.
The piston and booster assembly are designed around the operating requirements of handgun suppressor systems, not rifle-pressure mounting applications.
On a fixed-barrel firearm, the booster normally does not need to reciprocate. SilencerCo specifies use of a Fixed Barrel Spacer in compatible piston-equipped systems when the same suppressor is used on an appropriate fixed-barrel pistol-caliber host.
Do not treat a tilting-barrel booster setup and a fixed-barrel setup as interchangeable without configuring the suppressor correctly for the host firearm.
One advantage of SilencerCo's piston system is that the piston can be changed to match different compatible barrel threads.
If two pistols use different muzzle threads but the suppressor supports both, the shooter can install the appropriate piston instead of replacing the entire suppressor mounting system.
For a factory-threaded 9mm host using M13.5x1 LH, AC26 is SilencerCo's standard-length piston for that interface.
Shop related SilencerCo accessories: SilencerCo | SilencerCo Suppressor Accessories | Silencers & Suppressors
The SilencerCo AC30 Piston (5/8x24) is a key component for configuring compatible pistol suppressors to run reliably on larger-caliber, threaded handgun platforms. As part of the Nielsen device system, this piston enables proper cycling of semi-automatic pistols by allowing the suppressor to move independently during firing.
Built from heat-treated 17-4 stainless steel, the AC30 is engineered for durability under repeated firing and harsh conditions. The 5/8x24 thread pattern is widely used across .30 caliber platforms and certain handgun or subgun applications, making this piston an essential interface for expanding suppressor compatibility across multiple hosts.
SilencerCo pistons are designed for quick interchangeability, allowing a single suppressor to be adapted to different firearms simply by changing thread patterns. The AC30 also supports use on fixed-barrel systems when paired with a fixed barrel spacer, giving it additional flexibility across pistol caliber carbines and similar platforms.
System Insight: Proper piston selection is critical to suppressor function. The AC30 ensures reliable cycling and alignment when running a suppressor on hosts using the 5/8x24 thread standard, making it a foundational component in a properly configured suppressor system.
Shop more suppressors and accessories at Huckleberry Arms: Suppressors
The SilencerCo AC2439 Bravo Direct Thread Mount provides a simple way to attach a compatible Bravo / HUB-pattern suppressor directly to a firearm with 11/16x24 muzzle threads.
Rather than leaving a separate muzzle brake or flash hider installed on the firearm, the AC2439 installs in the rear of the suppressor and provides the female 11/16x24 interface that threads directly onto the barrel.
For a dedicated suppressed rifle where fast suppressor removal is less important than minimizing length, weight and complexity, direct thread is one of the cleanest mounting methods available.
SilencerCo's own barrel-thread specification identifies 11/16x24 as a thread pattern most commonly associated with .450-caliber rifles.
That makes AC2439 particularly relevant to compatible large-bore hosts such as certain .45-70 Government and .458-caliber rifles that use 11/16x24 muzzle threads.
Thread pitch alone does not establish suppressor compatibility. Always verify the firearm's actual barrel threads, cartridge, bullet diameter and the suppressor's caliber rating before installation.
SilencerCo's Bravo mounting pattern uses 1.375x24 rear threads, the interface now widely referred to throughout the suppressor industry as HUB.
SilencerCo originally introduced this mounting format with the Omega 300, and the 1.375x24 pattern was subsequently adopted by numerous suppressor manufacturers.
That widespread support makes Bravo / HUB one of the most flexible suppressor mounting standards available.
The AC2439 has two separate interfaces that should not be confused:
The mount screws into the rear of a compatible Bravo/HUB suppressor. The suppressor-and-mount assembly then threads directly onto the firearm's 11/16x24 muzzle.
One of the primary advantages of SilencerCo's direct-thread mount is reduced overall length.
SilencerCo states that its Bravo Direct Thread Mount configuration shortens the overall length of the suppressor by approximately 3/4" compared with using the company's ASR Mount.
That difference is useful on hunting rifles, lever guns and other firearms where minimizing added muzzle length is more important than having a quick-detach suppressor system.
A direct-thread system eliminates the separate suppressor muzzle brake or flash hider required by many QD mounting systems.
Instead, the mounting chain is simply:
There is no locking collar, ratchet, spring or secondary firearm-side suppressor mount involved.
The reduced component count makes direct thread especially attractive for a suppressor that will spend most of its time on one particular rifle.
SilencerCo currently lists the Hybrid 46 among the suppressors compatible with its Bravo Direct Thread Mount family.
For AC2439 specifically, the Hybrid 46 is an especially logical pairing because many 11/16x24 hosts are large-bore rifles that require the Hybrid 46's larger projectile clearance.
This can include appropriately threaded .45-70 and .458-caliber hosts, provided the specific firearm configuration falls within SilencerCo's caliber and barrel-length requirements.
This is an important distinction with Bravo / HUB mounting components.
SilencerCo currently lists the Bravo Direct Thread Mount family as compatible with suppressors including the Omega 300, Hybrid 46 and Scythe-Ti.
That means the mount can physically interface with those suppressors through the Bravo / HUB rear thread pattern. It does not mean every suppressor can safely fire every cartridge associated with an 11/16x24 barrel.
For example, a mount may physically thread into a .30-caliber Bravo suppressor while the host rifle fires a projectile far too large to pass safely through that suppressor.
Always verify suppressor caliber and barrel-length ratings independently from mount compatibility.
The AC2439 should not be confused with the SilencerCo Bravo ASR Mount.
The ASR system uses an ASR muzzle brake or flash hider installed on the firearm and a locking ASR mount installed in the suppressor.
The AC2439 eliminates that intermediate muzzle device and attaches the suppressor directly to the barrel instead.
Choose ASR when faster suppressor installation and removal or a permanent firearm-side muzzle device is desirable. Choose direct thread when simplicity, minimum length and minimum mounting-system weight are higher priorities.
SilencerCo describes its Direct Thread Mounts as a simple solution for attaching compatible silencers to most fixed-barrel firearms.
Direct-thread rifle mounts such as AC2439 are rigid mounting systems and are not substitutes for the piston / Nielsen-device systems required by many recoil-operated tilting-barrel handguns.
SilencerCo's current 11/16x24 barrel-thread drawing specifies that its centerfire rifle accessories in this thread pattern shoulder behind the muzzle threads.
Correct barrel-thread geometry, shoulder dimensions and bore concentricity are important whenever installing a suppressor.
If the firearm's muzzle dimensions or thread quality are uncertain, they should be inspected before live fire.
Direct thread is particularly appealing on a rifle where the suppressor will remain installed for most of its use.
A suppressed hunting rifle, lever gun or large-bore field rifle does not necessarily benefit from carrying the additional length and complexity of a quick-detach system if the suppressor rarely comes off.
For that type of setup, the AC2439 combines the industry-standard Bravo/HUB suppressor interface with the less-common 11/16x24 barrel thread in a compact factory SilencerCo mount.
Shop more SilencerCo suppressor accessories at Huckleberry Arms: SilencerCo | SilencerCo Suppressor Accessories | Silencers & Suppressors
Requires an ASR-mounted SilencerCo suppressor for quick-detach suppressor function.
The SilencerCo AC141 ASR Flash Hider is a 1/2x28 threaded 5.56 NATO / .223 Remington muzzle device for AR-15 rifles and other compatible 1/2x28 threaded hosts. It works as a stand-alone flash hider and also serves as a suppressor mounting interface for compatible SilencerCo ASR suppressor setups.
SilencerCo designed the ASR Flash Hider to reduce visible muzzle flash while providing compatibility with the SilencerCo ASR Mount. When paired with the proper ASR-equipped suppressor, this muzzle device supports a quick mount suppressor interface for compatible SilencerCo systems.
ASR Suppressor Mount Compatibility: The AC141 is part of SilencerCo’s ASR mounting family. It is intended for use with compatible SilencerCo suppressors and ASR mounts. Always confirm the suppressor model, ASR mount type, caliber rating, and barrel thread pitch before installation or suppressor use.
1/2x28 for 5.56 NATO and .223 Remington: This AC141 model uses 1/2x28 threads and is intended for .223/5.56mm applications. The 1/2x28 thread pitch is common on AR-15 barrels chambered in 5.56 NATO and .223 Remington.
Flash Reduction with Resonance Suppression: SilencerCo states that the ASR Flash Hider significantly suppresses muzzle flash and uses a resonance suppression method intended to reduce the tuning-fork effect common with some 3-prong flash hider designs.
Installation Note: Proper installation is important for suppressor alignment. Use the correct shims, torque guidance, and installation method recommended by SilencerCo. Do not use a crush washer with suppressor-compatible muzzle devices.
Important Fitment Note: Always confirm barrel thread pitch, caliber, bore clearance, suppressor compatibility, ASR mount compatibility, shoulder geometry, torque requirements, and alignment before installation or live fire.
Related Gear: Browse more SilencerCo products, shop additional silencer muzzle devices, or pair your rifle with compatible 5.56 NATO / .223 Ammo.
The SilencerCo AC590 ASR Flash Hider is a 5/8x24 threaded .30 caliber / 7.62mm muzzle device for compatible rifle hosts. It works as a stand-alone flash hider and also serves as a suppressor mounting interface for compatible SilencerCo ASR suppressor setups.
SilencerCo designed the ASR Flash Hider to reduce visible muzzle flash while providing compatibility with the SilencerCo ASR Mount. When paired with the proper ASR-equipped suppressor, this muzzle device supports a quick attach/detach suppressor interface for compatible SilencerCo systems.
5/8x24 Thread Pattern for .30 Caliber Hosts: This AC590 model uses 5/8x24 threads and is intended for compatible .30 caliber / 7.62mm applications. The 5/8x24 thread pitch is commonly used on many .308 Winchester, 7.62 NATO, 300 Blackout, 6.5 Creedmoor, and similar threaded rifle barrels. Always confirm actual barrel thread pitch, caliber, and bore clearance before installation.
ASR Suppressor Mount Compatibility: The AC590 is part of SilencerCo’s ASR mounting family and was historically associated with Specwar 7.62 applications. It is intended for use with compatible SilencerCo suppressors and ASR mounts. Always confirm the suppressor model, ASR mount type, caliber rating, and barrel thread pitch before installation or suppressor use.
Related Gear: Browse more SilencerCo products, shop additional silencer muzzle devices, or pair your rifle with compatible centerfire rifle ammunition.
Confirm suppressor model, caliber, and front cap compatibility before use. SilencerCo lists AC1412 as a .355 / 9mm Bravo Front Cap for Hybrid-only use.
The SilencerCo AC1412 Bravo Front Cap is a .355 / 9mm Sniper Gray replacement front cap for compatible SilencerCo Hybrid suppressor setups. It allows the user to configure a compatible Bravo-front-cap suppressor for 9mm bore use instead of using a larger front cap.
SilencerCo designed Bravo Front Caps to let users switch between different calibers and optimize suppressor performance for the cartridge being used. Using the correct front cap can help improve suppression, and SilencerCo states that correct front caps may reduce sound levels by approximately 2 to 5 dB on a suppressor.
.355 / 9mm Front Cap: This AC1412 model is the 9mm / .355 bore Bravo Front Cap. It is intended for compatible 9mm use where the suppressor, host firearm, barrel, mount, and ammunition are all appropriate for that configuration.
Hybrid Compatibility Note: SilencerCo’s current Bravo Front Cap SKU listing identifies AC1412 .355 / 9mm as Hybrid only. Do not assume compatibility with every Bravo-front-cap suppressor simply because the front cap family shares the Bravo name. Confirm your specific suppressor model before installation.
Why Use a Caliber-Specific Front Cap: A properly matched front cap can reduce excess bore opening at the front of the suppressor compared to a larger-caliber cap. This may improve sound performance when using a compatible suppressor with 9mm ammunition.
Important Fitment Note: Always confirm suppressor model compatibility, bore size, caliber, projectile diameter, barrel threading, mount configuration, host firearm, ammunition type, and alignment before installation or live fire. Never use a front cap with a bore smaller than the projectile being fired.
Related Gear: Browse more SilencerCo products, shop additional silencer front caps, or pair your compatible host with 9mm Ammo.
The SilencerCo AC591 ASR Muzzle Brake is a 5/8x24 threaded .30 caliber / 7.62mm 3-port muzzle brake for compatible rifle hosts. It works as a stand-alone muzzle brake for recoil and muzzle-rise reduction and also serves as a suppressor mounting interface for compatible SilencerCo ASR suppressor setups.
SilencerCo designed the ASR Muzzle Brake to redirect propellant gases to help reduce felt recoil and muzzle climb. When paired with the proper ASR-equipped suppressor, this muzzle device supports a quick attach/detach suppressor interface for compatible SilencerCo systems.
5/8x24 Thread Pattern for .30 Caliber Hosts: This AC591 model uses 5/8x24 threads and is intended for compatible .30 caliber / 7.62mm applications. The 5/8x24 thread pitch is commonly used on many .308 Winchester, 7.62 NATO, 300 Blackout, 6.5 Creedmoor, and similar threaded rifle barrels. Always confirm actual barrel thread pitch, caliber, and bore clearance before installation.
ASR Suppressor Mount Compatibility: The AC591 is part of SilencerCo’s ASR mounting family and is intended for use with compatible SilencerCo suppressors and ASR mounts. Always confirm the suppressor model, ASR mount type, caliber rating, and barrel thread pitch before installation or suppressor use.
Shim Set Included: SilencerCo states that each ASR muzzle brake comes with a shim set for installation. Proper timing and alignment are important for muzzle brake performance and suppressor use.
The SilencerCo AC1570 ASR Flash Hider is a 1/2x28 threaded 9mm muzzle device for compatible 9mm hosts. It works as a stand-alone flash hider and also serves as a suppressor mounting interface for compatible SilencerCo ASR suppressor setups.
1/2x28 Thread Pattern for 9mm Hosts: This AC1570 model uses 1/2x28 threads and is intended for compatible 9mm applications. Always confirm the actual barrel thread pitch, caliber, and bore clearance before ordering or installing any suppressor-compatible muzzle device.
ASR Suppressor Mount Compatibility: The AC1570 is part of SilencerCo’s ASR mounting family. It is intended for use with compatible SilencerCo suppressors and ASR mounts. Always confirm the suppressor model, ASR mount type, caliber rating, and barrel thread pitch before installation or suppressor use.
The SilencerCo AC1561 ASR Flash Hider is a M13.5x1 LH threaded 9mm muzzle device for compatible metric left-hand threaded hosts. It works as a stand-alone flash hider and also serves as a suppressor mounting interface for compatible SilencerCo ASR suppressor setups.
M13.5x1 LH Metric Thread Pattern: This AC1561 model uses M13.5x1 left-hand threads, a metric thread pattern commonly found on select European-style threaded 9mm barrels and host firearms. Always confirm the actual barrel thread pitch and thread direction before ordering.
ASR Suppressor Mount Compatibility: The AC1561 is part of SilencerCo’s ASR mounting family. It is intended for use with compatible SilencerCo suppressors and ASR mounts. Always confirm the suppressor model, ASR mount type, caliber rating, and barrel thread pitch before installation or suppressor use.
Important Fitment Note: Always confirm barrel thread pitch, left-hand thread direction, caliber, bore clearance, suppressor compatibility, ASR mount compatibility, shoulder geometry, torque requirements, and alignment before installation or live fire.
The SilencerCo TOMD Compact Radial Brake AC5232 is a .30-caliber muzzle brake for barrels threaded 1/2x28. TOMD stands for Thread Over Muzzle Device: this brake can be used on its own to reduce felt recoil, then paired with a separately purchased SilencerCo Thread Over Mount when the owner wants to attach a compatible suppressor.
Its radial brake design does not need to be timed or clocked on the barrel. That makes installation simpler than a directional brake while still giving the shooter a compact muzzle device that can serve as the foundation of a TOM suppressor-mount setup.
The TOMD brake is the host device installed on the rifle barrel. It does not accept a suppressor directly. To use it as a suppressor mount, add the appropriate SilencerCo Thread Over Mount, which screws over the TOMD brake and connects to the rear interface of the compatible suppressor.
Choose the mount around the suppressor—not simply the barrel. The Bravo TOM Mount AC5230 is for suppressors using the Bravo accessory family, while the Charlie TOM Mount AC5229 is for suppressors using the Charlie accessory family. The brake, TOM mount, suppressor rear interface, and rifle caliber all need to be compatible before firing.
This brake makes sense for the shooter who wants a compact radial brake left on the rifle while retaining a quick attach/detach suppressor option through the TOM system. It is a different system from SilencerCo ASR mounts and should not be purchased as an ASR replacement.
It is also not a direct-thread suppressor mount by itself. The value of TOMD is that the brake remains installed on the host barrel, while the separate TOM mount provides the suppressor connection when needed.
AC5232 is specifically the 1/2x28-threaded version with a .30-caliber bore. Confirm the barrel's actual muzzle thread pattern before ordering. A matching thread pitch alone is not enough: verify proper shoulder support, bore clearance, suppressor rating, and alignment for the firearm and ammunition being used.
As with any muzzle brake, the recoil reduction comes with more lateral blast and concussion than a comparable flash hider when fired unsuppressed. That tradeoff is worth considering for a rifle used around other shooters, inside covered firing lines, or in confined environments.
This is a strong choice for a shooter building a .30-caliber-bore rifle around the SilencerCo TOM system and needing a compact 1/2x28 host brake. It is especially useful when the goal is simple installation, no timing requirement, recoil reduction during unsuppressed use, and the ability to add the correct Bravo or Charlie TOM mount later.
It is not the right choice for a rifle that needs an ASR muzzle device, a flash hider, or a direct-thread suppressor solution without an added mount component.
The SilencerCo TOMD Compact Radial Brake AC5233 is a .30-caliber muzzle brake for barrels threaded 5/8x24. TOMD stands for Thread Over Muzzle Device: this brake can be used on its own to reduce felt recoil, then paired with a separately purchased SilencerCo Thread Over Mount when the owner wants to attach a compatible suppressor.
AC5233 is specifically the 5/8x24-threaded version with a .30-caliber bore. Confirm the barrel's actual muzzle thread pattern before ordering. A matching thread pitch alone is not enough: verify proper shoulder support, bore clearance, suppressor rating, and alignment for the firearm and ammunition being used.
This is a strong choice for a shooter building a .30-caliber-bore rifle around the SilencerCo TOM system and needing a compact 5/8x24 host brake. It is especially useful when the goal is simple installation, no timing requirement, recoil reduction during unsuppressed use, and the ability to add the correct Bravo or Charlie TOM mount later.
The SilencerCo TOMD Compact Radial Brake AC5231 is a .223 / 5.56 muzzle brake for barrels threaded 1/2x28. TOMD stands for Thread Over Muzzle Device: this brake can be used on its own to reduce felt recoil, then paired with a separately purchased SilencerCo Thread Over Mount when the owner wants to attach a compatible suppressor.
AC5231 is specifically the 1/2x28-threaded version with a .223 / 5.56 aperture. Confirm the barrel's actual muzzle thread pattern before ordering. A matching thread pitch alone is not enough: verify proper shoulder support, bore clearance, suppressor rating, and alignment for the firearm and ammunition being used.
This is the .223 / 5.56-bore version of the TOMD brake and should not be used with larger projectiles such as .30-caliber rifle cartridges. For a 1/2x28 barrel requiring a .30-caliber bore, use the AC5232 instead.
This is a strong choice for a shooter building a .223 / 5.56 rifle around the SilencerCo TOM system and needing a compact 1/2x28 host brake. It is especially useful when the goal is simple installation, no timing requirement, recoil reduction during unsuppressed use, and the ability to add the correct Bravo or Charlie TOM mount later.
It is not the right choice for a rifle that needs an ASR muzzle device, a flash hider, a .30-caliber bore, or a direct-thread suppressor solution without an added mount component.
The SilencerCo AC5125 is a black Bravo Front Cap with a caliber-specific opening for .224-caliber and 5.56mm projectiles. It replaces the existing removable front component on compatible SilencerCo suppressors or the Bravo MAAD Brake, providing a flat front profile and tighter projectile clearance than a larger-bore cap.
This is the black .224 / 5.56mm configuration. SilencerCo manufactures visually similar Bravo Front Caps in several bore sizes and finishes, so the manufacturer part number and caliber marking should be confirmed before installation. AC5125 should not be confused with the .30-caliber AC5124 or .355 / 9mm AC5126 models.
A suppressor capable of handling several calibers may be supplied with a front cap large enough for the suppressor’s maximum projectile diameter. When that suppressor is used on a smaller-caliber host, installing the correctly sized front cap reduces the amount of open space surrounding the projectile as it exits the suppressor.
SilencerCo states that using the correct caliber-specific front cap may reduce the measured sound level by approximately 2–5 dB. The actual improvement will vary with the suppressor, host firearm, barrel length, ammunition, mounting configuration and testing conditions.
SilencerCo lists the AC5125 Bravo Front Cap as compatible with the Omega 300, Hybrid 46, Scythe-Ti and Bravo MAAD Brake. Compatibility is based on the front-cap interface and should not be inferred solely from a suppressor’s caliber rating or use of another Bravo-pattern mounting component.
This front cap is not compatible with the SilencerCo Harvester Evo. The Harvester Evo may use Bravo-pattern rear mounting accessories, but SilencerCo specifically excludes it from Bravo Front Cap compatibility.
The AC5125 provides a simple flat front profile for shooters who do not require a front-mounted anchor brake. It can be used to configure a compatible suppressor for a clean, streamlined appearance while maintaining the removable front-cap system supported by the suppressor manufacturer.
This product is the front cap only. It does not include a suppressor, rear mount, muzzle device, piston, booster assembly or installation tool unless specifically shown and stated by Huckleberry Arms.
The .224 / 5.56mm designation describes the opening through this front cap; it does not independently establish that a suppressor is rated for every cartridge using a .224-caliber projectile. The host firearm, ammunition, suppressor and mounting system must each fall within SilencerCo’s published operating limits.
Never fire a projectile larger than the installed front-cap opening. Before live fire, verify the front cap is securely installed and confirm suppressor alignment, projectile clearance and complete-system compatibility. An incorrectly sized cap or misaligned suppressor can cause an end-cap strike, baffle strike or other equipment damage.
The AC5125 is a genuine SilencerCo replacement and configuration component manufactured for supported Bravo front-cap interfaces. Choosing the factory component preserves the intended fit and allows the suppressor to be configured without relying on a third-party cap of uncertain dimensions.
This front cap is a non-serialized accessory and is not a complete suppressor. Purchasing the AC5125 by itself does not require an NFA transfer, although the suppressor on which it is installed remains subject to all applicable laws and regulations.
The Advanced Armament AAC HUB Adapter SR-105495 allows compatible suppressors utilizing the industry-standard HUB (Bravo) 1.375x24 rear thread pattern to interface with AAC's Ranger Series mounting system. As HUB compatibility has become the de facto industry standard for modular suppressor mounting, this factory AAC adapter gives shooters greater flexibility when configuring their suppressor system.
Precision machined to AAC specifications, the HUB Adapter provides a secure connection between compatible suppressors and AAC mounting components while maintaining proper alignment and repeatable installation. Its rugged steel construction is engineered to withstand repeated suppressor installation and removal under demanding shooting conditions.
The 1.375x24 HUB interface is supported by numerous suppressor manufacturers, making this adapter an excellent solution for shooters who value modularity and cross-platform compatibility. Whether configuring a new suppressor or expanding an existing collection, the AAC HUB Adapter provides a genuine factory mounting solution designed specifically for AAC suppressor systems.
For suppressor owners looking to maximize compatibility without sacrificing factory fit and finish, the AAC HUB Adapter SR-105495 is an essential addition to a modular suppressor setup.
The SilencerCo AC1756 Piston is a 1/2x28 SN 9mm suppressor piston for compatible SilencerCo pistol suppressor systems. The SN piston is intended for short-thread pistol barrels that require this specific piston style rather than a standard 1/2x28 piston.
SilencerCo pistons are designed to be easily changed for different host firearms, calibers, and barrel thread patterns. They are made from 17-4 stainless steel and heat treated for durability. The piston is part of the Nielsen device/booster system that allows many semi-automatic tilting-barrel pistols to cycle properly with a suppressor attached.
1/2x28 SN Piston: The AC1756 is the 1/2x28 SN version. SilencerCo specifically notes that the Glock 43 requires the 1/2x28 SN piston because of the shorter threads on the Glock 43 threaded barrel.
For Compatible SilencerCo Suppressor Systems: SilencerCo pistons are commonly used with compatible pistol suppressor families such as Osprey, Octane, Omega K, Hybrid, and other manufacturer-approved configurations. Always confirm compatibility with your exact suppressor model before ordering.
Tilting-Barrel Handgun Use: Pistons and boosters are generally used on semi-automatic tilting-barrel pistols. For fixed-barrel hosts, use the correct fixed-barrel spacer, fixed mount, or manufacturer-recommended configuration for your suppressor and firearm setup.
Important Fitment Note: This AC1756 model is the 1/2x28 SN piston. Always confirm barrel thread pitch, SN piston requirement, suppressor compatibility, host firearm action type, bore alignment, and manufacturer instructions before installation or live fire.
