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Enhance your AR15 or 308 AR10 Type extractor reliability by adding one of these Mil-Spec Fluorosilicone O-rings to your bolt assembly. If your rifle, carbine, or pistol AR15 is having reliability problems related to extracting this may be your most affordable fix and at worst will be a benefit regardless.
Similar to Armalite EB0065, but able to withstand higher temperatures.
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SCHMID AR-15 CARBINE BUFFER SPRING CHROME SILICON BLACK OXIDE is a straightforward carbine-style buffer spring for the AR-15 platform. Built with chrome silicon and finished in black oxide, it is a clean, practical choice for replacement use, fresh lower builds, or general-purpose carbine recoil system setups.
Chrome silicon spring material is widely used where repeated cycling and resistance to spring set matter. In recoil-spring applications, it is commonly valued for holding its properties well under repeated compression and high round counts, making it a strong material choice for a hard-working AR buffer spring.
The
black oxide finish adds a subdued, non-reflective surface and is commonly used to provide mild corrosion resistance on steel parts. Put simply, this Schmid spring keeps to the essentials: the right platform, the right style, and proven materials for a standard carbine recoil system.
If you need a dependable
AR-15 carbine buffer spring from a known OEM source, the SCHMID AR-15 CARBINE BUFFER SPRING CHROME SILICON BLACK OXIDE is a solid no-nonsense part that belongs in the bin for builds, repairs, and spares.
Shop more AR-15 parts and accessories at Huckleberry Arms.
AR-15 Store | AR-15 Lower Parts | Buffers & Springs
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SCHMID MIL-SPEC HARDENED STEEL BLACK OXIDE RECEIVER EXTENSION CASTLE NUT is a small part that does serious work on an AR build. This mil-spec receiver extension nut is made to secure the receiver extension and lock plate in place on an adjustable-stock AR-15 setup, giving the lower receiver assembly the proper retention it needs where it counts.
Schmid’s mil-spec version is built from hardened steel and finished in black oxide, giving you a tougher and more purpose-built part than bargain-bin hardware that cuts corners on material or finish. On a hard-use rifle, that matters. A castle nut takes real torque, and it needs to hold up when the stock assembly is properly installed and staked.
This version also includes staking cuts, which is one of the details serious builders look for. Those cuts give you the proper surface for staking the end plate into the nut after installation, helping the assembly resist loosening over time under recoil, handling, transport, and general hard use. It is a simple part, but it is one of those places where using a proper mil-spec component is just good judgment.
If you are finishing out a lower, replacing worn hardware, or building an AR the right way from the start, the SCHMID MIL-SPEC HARDENED STEEL BLACK OXIDE RECEIVER EXTENSION CASTLE NUT is a clean, dependable choice backed by a respected OEM name in the AR parts world.
Shop more AR-15 parts and accessories at Huckleberry Arms.
AR-15 Store | AR-15 Lower Parts | Buffer Tubes & Receiver Extensions
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Mil-Spec rifle buffer spring for use in A2 and A4 AR15 rifles with a fixed buttstock. Perfect for your new build or as a direct replacement for worn out parts. Note: Not for use on carbine models with a collapsible stock. Made in the USA.
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Use this when mounting your A2 or similar flash-hider on barrels threaded with 1/2X28 TPI. It is suitable for Aero Precision's and most other manufacturers 5.56X45 NATO, 223 Remington, 300 Blackout, and similar chambered barrels and more.
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Mil-spec receiver extension lock nut (castle nut) for use on AR15 carbines with an adjustable stock. Perfect for your new build or as a direct replacement for worn out parts.
Made in the USA
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Use this when mounting your A2 or similar flash-hider on barrels threaded with 1/2X28 TPI. It is suitable for Aero Precision's and most other manufacturers 5.56X45 NATO, 223 Remington, 300 Blackout, and similar chambered barrels and more.
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Mil-spec. receiver extension end plate. For use on AR15 carbines with an adjustable stock.
Made in the USA
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Mil-Spec carbine buffer spring for use in AR15 carbines and pistols with a collapsable butt-stocks or braces. Perfect for your new build or as a direct replacement for worn out parts. Note: Not for use on rifles models with a fixed rifle stock.
Made in the USA.
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SCHMID AR-15 STANDARD HARD BLACK ANODIZED CARBINE BUFFER 3 OZ is a straightforward standard-weight carbine buffer for the AR-15 platform. Built as a traditional 3 oz carbine buffer, it is the familiar baseline choice for rifles using a carbine receiver extension and standard carbine recoil system components.
This Schmid buffer keeps things simple and serviceable. For fresh lower builds, replacement parts, or general-purpose AR carbines, a standard 3 oz buffer remains the classic starting point when you want dependable function without adding unnecessary complexity to the recoil system.
This version also features a hard black anodized finish, giving it a clean, durable exterior finish consistent with quality AR components. That makes it a solid choice for builders who want a proper OEM-style buffer from a respected parts manufacturer.
If your build calls for a proven standard carbine buffer, the SCHMID AR-15 STANDARD HARD BLACK ANODIZED CARBINE BUFFER 3 OZ is a clean, practical part that does exactly what it ought to do.
Shop more AR-15 parts and accessories at Huckleberry Arms.
AR-15 Store | AR-15 Lower Parts | Buffers & Springs
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This trigger guard not only gives you a bit more room for your finger, it fills the gap between the receiver, an area that gives some users blisters, and looks better than the original design.
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Classic Mil-spec A2 Flash-hider
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The Extended Magazine Catch Button is a drop in replacement for the standard lower receiver magazine catch button. This extended button is longer, allowing it to protrude the proper distance when used with our M5 Lower Receiver. Made from Aluminum.
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The Die Free Co Plug™ is a purpose-built storage insert designed exclusively for the Die Free Co Kung Fu Grip. This clever upgrade adds useful internal storage while also improving grip ergonomics for shooters with larger hands.
The Plug allows the Kung Fu Grip to securely store two CR123, AA, or AAA batteries, along with a dedicated slot for a CR2032 battery. Additional storage pockets allow users to carry a small Allen or Torx wrench and even a MultiTasker NANO Tool inside the grip.
Beyond storage, the Plug also extends the grip length by approximately 0.25 inches and squares off the back of the grip to better fill the shooter’s palm. This small change can significantly improve comfort and control for users with larger hands.
The Plug installs using a secure friction-fit design and is constructed from durable rubber for long service life. Integrated water drainage holes help prevent moisture buildup inside the grip.
Compatibility: Designed exclusively for the Die Free Co Kung Fu Grip.
Available from Huckleberry Arms.
Shop Die Free Co accessories at Huckleberry Arms.
Huckleberry Arms carries a growing selection of Die Free Co gear and accessories designed to enhance reliability, durability, and performance for modern sporting rifles.
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Help protect your hands from the rough edges on your picatinny rails, burns when doing magazine dumps, and frostbite when operating in cold environments and look good doing it with these Magpul Ladder Rail Panels.
Made in U.S.A.
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Help protect your hands from the rough edges on your picatinny rails, burns when doing magazine dumps, and frostbite when operating in cold environments and look good doing it with these Magpul Ladder Rail Panels.
Made in U.S.A.
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The Magpul Ladder Rail Panel MAG013-BLK provides a lightweight, low-profile solution for covering unused 1913 Picatinny rail sections. Designed for AR-15 rifles, carbines, shotguns, and other firearms equipped with Picatinny rails, the Ladder Rail Panel helps protect rail surfaces while improving handling comfort and reducing sharp edges.
Manufactured from durable Santoprene, the Ladder Rail Panel creates a slightly rubberized gripping surface that improves weapon control while helping prevent exposed rail slots from snagging slings, packs, gloves, clothing, and other gear. Unlike bulky rail covers, the Ladder Rail Panel maintains a slim profile while still providing meaningful protection and comfort.
Each panel covers up to 18 Picatinny rail slots and can easily be trimmed to fit shorter rail sections. Whether you're configuring a classic quad rail handguard, protecting unused rail space, or improving overall weapon handling, the Magpul Ladder Rail Panel offers a simple and proven solution trusted by military, law enforcement, and civilian shooters alike.
Popular Pairings
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The BALLISTIC ADVANTAGE MID-LENGTH MELONITE GAS TUBE – BAPA100011 is a precision component designed to deliver consistent gas flow and reliable cycling in AR15 and AR10 platforms utilizing a mid-length gas system.
Mid-length gas systems are commonly found on 14.5"–16" barrels, offering a balanced operating profile between the sharper impulse of carbine systems and the smoother characteristics of rifle-length setups. This makes proper gas system components critical to achieving reliable function and controlled wear.
This gas tube features a Melonite (QPQ) surface treatment, significantly improving resistance to heat, corrosion, and fouling compared to untreated tubes. This is especially important in a component continuously exposed to high-temperature gases during firing. :contentReference[oaicite:1]{index=1}
Measuring approximately 11.75 inches, the tube is properly dimensioned for mid-length systems and works with standard gas blocks and upper receivers. A roll pin is included, allowing for straightforward installation. :contentReference[oaicite:2]{index=2}
While simple in appearance, the gas tube directly affects how the rifle cycles, recoils, and wears. A properly manufactured tube ensures consistent gas delivery and eliminates a common source of reliability issues in AR builds.
Complete your upper receiver system at Huckleberry Arms.
Upper Receiver Parts |
Gas Blocks & Accessories | Bolt Carrier Groups
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The BALLISTIC ADVANTAGE RIFLE LENGTH GAS TUBE – BAPA100068 is a foundational component for AR15 and AR10 platforms using a rifle-length gas system. Built from stainless steel and manufactured to precise dimensions, it ensures consistent gas delivery and reliable cycling across a wide range of conditions.
Gas system performance is critical to how a rifle functions. This tube is designed for rifle-length systems, typically found on barrels 18 inches and longer, where longer dwell time contributes to smoother operation and reduced component wear. :contentReference
Constructed from stainless steel, the tube offers improved corrosion resistance over standard finishes, helping maintain long-term reliability even under heat and fouling. This is particularly important in a component that is continuously exposed to hot gases during operation.
The tube measures approximately 15.125 inches and includes the required roll pin for installation, ensuring compatibility with standard gas blocks and upper receiver configurations.
Whether replacing a worn component or completing a new build, this gas tube provides a simple but critical piece of the system—one that directly impacts cycling consistency, recoil impulse, and overall reliability.
Complete your upper receiver system at Huckleberry Arms.
Upper Receiver Parts |
Gas Blocks & Accessories | Bolt Carrier Groups
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This is the AR15/M4/M16 magazine that all other magazines are judged against. A combat proven magazine that just keeps on going where other lesser magazines fail. This magazine offers superior feeding, impact resistance, corrosion proof, and more!
Works great with 55.6x45mm Nato, 223, 300 blackout. You should consider having at least 10 for each AR in your inventory.
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The L5AWM fills the gap between the current metal and polymer magazine designs combing the best features from both designs into a unique hybrid magazine. L5AWM has the reliability of a steel magazine, the durability of a polymer magazine and the weight of an aluminum magazine. Unique to the AWM is the one piece wrap-around hardened steel feed lip assembly that is permanently attached to an impact resistant polymer body.
The hardened steel feed lips won’t bend, break or deform due to rough handling or long term storage. An aggressive surface texture has been applied to the polymer body to improve gripping and retrieval from pouches. The combination of steel and polymer result in a lightweight, robust magazine tough enough for professional use. The L5 AWM is compatible with modern weapon systems; M4/M16/AR, HK416, SCAR16, and the ARX160 to name a few and is available in 10, 20 and 30 round capacity with a translucent or opaque polymer body.
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THE AERO PRECISION AR15/M5 FIX-IT KIT is a compact field repair and emergency spare parts kit designed to keep AR15 and Aero Precision M5 rifle platforms operational when critical small parts fail or become lost.
Anyone who has launched a takedown pin detent across the garage understands why kits like this exist. These are among the most commonly lost or damaged small parts during AR maintenance, upgrades, cleaning, and assembly.
Built around practical preparedness rather than bench-only maintenance, the Fix-It Kit provides commonly needed replacement components that are easy to misplace during cleaning, maintenance, upgrades, or field use. The compact format makes it ideal for range bags, rifle cases, hunting packs, vehicle kits, and emergency spares storage.
AR-platform rifles rely on numerous springs, detents, pins, and small components that can disable the firearm if damaged or lost. The Aero Precision Fix-It Kit helps shooters maintain readiness by keeping common replacement parts immediately available.
Why a Fix-It Kit Matters:
Many AR-platform failures in the field are not catastrophic breakages but rather missing or damaged small components that stop the firearm from functioning properly. Keeping spare repair parts available can prevent a minor issue from ending a range session, hunt, class, or training day.
Ideal Applications:
- Range Bags: Emergency spare parts and repair support
- Field Use: Hunting, ranch, and outdoor rifle setups
- Preparedness: Backup components for long-term maintenance
- Armorers & Builders: Common replacement parts storage
Compact & Practical:
The Aero Precision Fix-It Kit is designed to be stored where problems happen — not just on the workbench. It provides practical insurance against the small failures that can disable an otherwise reliable rifle.
Shop more AR15 parts and accessories at Huckleberry Arms:
AR15 Parts |
AR15 Lower Half Parts |
Aero Precision |
AR15 Armorer Tools
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If you are looking for a shorter mag for your AR-15 that is lighter to carry and shorter for shooting in the prone or bench-rest, then this is the magazine for you. All of the refinements you can expect from the GEN3, dust-cover, over-travel insertion stop, and slimline floor plate.
Works great with 55.6x45mm Nato, 223, 300 blackout.
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This is the standard 3oz weight carbine buffer, perfect for you AR15 carbine or pistol.
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Internal core unit for the MIAD as well as the MOE(R) and MOE-K2(R) Grips* designed to hold one (1) standard AR15/M4 complete bolt and firing pin, the perfect place to store critical back-up parts to keep your rifle running under the worst case senario.
Made in U.S.A.
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The next-generation PMAG 20 GEN M3 is a 20-round 5.56x45 NATO (.223 Remington) polymer magazine for AR15/M4 compatible weapons. Along with expanded feature set and compatibility, the GEN M3 incorporates new material technology and manufacturing processes for enhanced strength, durability, and reliability to exceed rigorous military performance specifications.
While the GEN M3 is optimized for Colt-spec AR15/M4 platforms, modified internal and external geometry also permits operation with a range of additional weapons such as the HK(R) 416/MR556A1/M27 IAR, British SA-80, FN(R) SCAR(TM) MK 16/16S, and others.
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Mounts on MAGPUL MOE light mounts and is perfect for mounting any light with a body diameter between .75"-1.040". We recommend one of our NITECORE USB rechargeable 18650 Lithium cell bodied flashlights so you are never left in the dark.
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Push-button quick-detach sling swivel for 1-1/4" webbing, compatible with QD sling attachment points. Manganese-phosphate finished steel. Combine with MS1 Sling for dedicated two-point sling, or with MS1 MS4 Adapter for two to one-point convertible sling.
Made in the U.S.A.
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Upgrade your MOE fixed rifle or fixed carbine stock with this plus a quick detach swivel to be able to quickly remove your sling under tactical situations, storage, or for use on another rifle.
See type 2 for UBR,STR
See type 3 for ACS, ACS-L
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The PMAG 17 GL9 is a 17-round Glock 9mm handgun magazine featuring a new proprietary all-polymer construction for flawless reliability and durability over thousands of rounds.
High visibility controlled-tilt follower, stainless steel spring, easily removable floorplate for cleaning, paint pen dot matrix for mag marking, ridged floorplate edges for better grip, and 17rd indicator windows. Drops free loaded or unloaded. All with the same boring reliability you expect from an OEM magazine.
The PMAG 17 GL9 is compatible with all full-size 9mm Glock handguns, as well as compact and sub-compact variants with some protrusion below the grip.
*NOTE: May not be compatible with other platforms designed for use with Glock magazines due to a wide range of magwell designs and tolerances.
Made in U.S.A.
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