The Mossberg 514 Conversion Kit provides a factory upgrade option for compatible Mossberg 500, 590, and 590A1 12-gauge shotguns. This kit includes a rugged 14" heavy wall barrel paired with a 6-round magazine tube assembly, allowing shooters to configure their shotgun into a more compact and maneuverable platform.
The heavy wall barrel design provides enhanced durability while maintaining reliable performance. A bead front sight offers quick target acquisition for defensive or close-range applications.
Finished in durable parkerized steel, the components are designed to withstand harsh environments while maintaining Mossberg’s reputation for reliability.
This factory kit includes the barrel, magazine tube assembly, and related components required for installation on compatible Mossberg shotgun platforms.
Available from Huckleberry Arms.
NFA Compliance Notice:
This kit includes a 14" barrel. Installation on a shotgun configured as a standard shoulder-fired shotgun may create a firearm regulated under the National Firearms Act (NFA). Buyers are responsible for ensuring compliance with all federal, state, and local laws before installing this product.
Always confirm your host firearm configuration and consult applicable regulations or a qualified professional if you are unsure.
The Mossberg 590 Shockwave 12 Gauge, model 50659, combines the established Mossberg 590 pump-action platform with the distinctive Shockwave Raptor bird's-head grip and a compact 14.375-inch heavy-walled barrel. Measuring 26.37 inches overall and weighing approximately 5.25 pounds, the factory configuration differs from both conventional shoulder-stocked shotguns and traditional handguns.
Introduced in 2017, the original 590 Shockwave brought Mossberg's well-established pump-action operating system into a specialized configuration without a shoulder stock. The firearm incorporates the familiar Mossberg 590 design features, including dual extractors, twin action bars, positive steel-to-steel lockup, and an anti-jam elevator.
The Shockwave Technologies Raptor grip is one of the defining characteristics of this model. Its curved bird's-head profile distinguishes the Shockwave from conventional pistol-grip firearms and contributes to the factory configuration's overall dimensions.
A black synthetic corncob-style forend incorporates a retention strap. The strap provides an additional hand-positioning reference while the pump-action mechanism is operated.
The 590 Shockwave retains the mechanical features associated with Mossberg's pump-action design: dual extractors, twin action bars, steel-to-steel lockup, and an anti-jam elevator. An ambidextrous top-mounted safety provides a familiar control layout for users accustomed to Mossberg 500 and 590 platforms.
The heavy-walled 14.375-inch barrel features a matte-blue finish, cylinder-bore choke and front bead sight. The receiver is drilled and tapped for compatible accessories, subject to the manufacturer's requirements.
Model 50659 is chambered for 12-gauge shotshells up to 3 inches in length and has a factory capacity of five rounds in the magazine plus one in the chamber when using the manufacturer's specified standard ammunition.
This is the original 590 Shockwave rather than the later 590S model. The 590S has a redesigned feeding system for additional shell-length flexibility; those 590S-specific capabilities should not be assumed for model 50659.
In its original factory configuration, Mossberg identifies the 590 Shockwave as a non-NFA firearm under federal law. Although commonly grouped with shotguns in retail catalogs, the factory model is classified as a Gun Control Act firearm rather than a conventional shoulder-fired shotgun.
FFL transfer required. Purchaser must be at least 21 years of age. State and local restrictions may apply. See Extended Information for additional classification and compliance details.
California Proposition 65 Warning: This product can expose users to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
Explore related Mossberg-compatible equipment and shooting accessories available through Huckleberry Arms. Always confirm specific firearm and ammunition compatibility before use.
The MOSSBERG 500 SUPER BANTAM COMBO FIELD/DEER is a versatile 20 gauge pump-action shotgun designed to give smaller-statured shooters a better fit without sacrificing real-world hunting performance. Built on Mossberg’s proven 500 action, this combo package includes two barrels: a 22" vent rib field barrel with Accu-Set choke system for small game, birds, and general field use, and a 24" fully rifled deer barrel with adjustable rifle sights for slug hunting.
The Super Bantam configuration is purpose-built for youth and compact shooters, featuring a smaller grip for improved trigger reach, a shorter and more manageable overall setup, and a 1" stock spacer that allows the length of pull to grow from 12" to 13". That makes this shotgun especially appealing for families wanting a firearm that can fit a younger shooter now while remaining useful later.
Mossberg also retains the core features that have made the 500 series so respected: dual extractors, steel-to-steel lockup, twin action bars, an anti-jam elevator, and an ambidextrous tang safety. Finished in Mossy Oak Break-Up Country, this combo is equally at home in the deer woods, along the tree line, or riding in the truck during hunting season.
For hunters wanting one shotgun that can handle both field hunting and deer season in a lightweight, better-fitting package, the MOSSBERG 500 SUPER BANTAM COMBO FIELD/DEER 54215 offers excellent flexibility and proven pump-gun reliability.
Shop more shotguns and accessories at Huckleberry Arms. Explore our selection of Shotguns, Shotgun Ammunition, Optics and Mounts, and Slings
The Mossberg 590A1 model 51689 is a factory-produced short-barreled shotgun that combines the compact handling of a 14-inch barrel with the heavy-duty construction that distinguishes the 590A1 from a standard sporting pump shotgun. This is a complete NFA-regulated firearm built by Mossberg in its original configuration—not an aftermarket barrel conversion or a shotgun that has been cut down after manufacture.
At only 33.75 inches overall, the shotgun is substantially more compact than a conventional 18.5- or 20-inch 590A1 while retaining a fixed shoulder stock, full-size controls and a 3-inch chamber. The shorter configuration is intended for lawful professional, security, defensive and collection applications where maneuverability matters but the shooter still wants the stability and familiar handling of a shoulder-fired shotgun.
Mossberg builds the 590A1 around components intended for harder use than the standard Model 500 or 590 sporting configuration. Model 51689 uses a heavy-walled 14-inch barrel, metal trigger guard and metal safety button, Parkerized finish and a clean-out magazine tube.
The heavy barrel adds strength and resistance to deformation during rough handling. The metal trigger housing and safety replace the polymer components commonly found on lighter Mossberg configurations, while the Parkerized exterior provides a subdued, corrosion-resistant working finish.
The magazine tube can be opened from the muzzle end for cleaning and inspection. That clean-out design makes it easier to remove accumulated debris, moisture or residue without disassembling the complete receiver and action.
The 590A1 uses twin action bars to guide the forend and reduce binding as the action cycles. Dual extractors grip the fired shell from both sides of the case rim, while the steel-to-steel lockup secures the bolt into the barrel extension during firing.
An anti-jam elevator helps maintain reliable feeding from the tubular magazine, and the top-mounted safety is visible and accessible from either side of the receiver. This control layout is particularly natural with a conventional field-style stock because the firing hand does not need to reach around a pistol grip to operate the safety.
As with every pump-action shotgun, dependable operation still requires the action to be cycled completely through its rearward and forward travel. Ammunition should be tested in the individual firearm to confirm feeding, extraction, ejection and pattern performance.
Model 51689 is equipped with a protected front sight and an adjustable ghost-ring rear sight. Compared with a simple bead, the aperture-style rear provides a more defined sight picture when using buckshot or slugs and allows the shooter to confirm both elevation and windage alignment.
The receiver is also drilled and tapped, providing the option of adding a compatible optic rail or mounting system. No optic rail or electronic sight is listed as included with this model, so any mount should be selected separately and verified for compatibility with the Mossberg receiver pattern.
The synthetic forend incorporates a retention strap that helps the support hand remain indexed on the pump during rapid or forceful cycling. This is especially useful on the short 14-inch configuration, where the muzzle is positioned closer to the support hand than it would be on a conventional sporting shotgun.
The fixed black synthetic stock provides a 13.87-inch length of pull and incorporates storage for four additional 12-gauge shells. The spare-shell storage keeps a limited ammunition reserve directly on the firearm without adding a separate receiver-mounted side carrier.
The tubular magazine holds five shells, with an additional round permitted in the chamber for a total listed capacity of 5+1. Actual capacity can vary with shell length and ammunition construction.
The 12-gauge chamber accepts compatible shotshells up to 3 inches in length. The barrel uses a fixed cylinder bore rather than interchangeable choke tubes, supporting broad patterning with buckshot and compatibility with appropriate shotgun slugs.
Individual buckshot loads can produce significantly different patterns from the same cylinder-bore barrel. Buyers should pattern the exact ammunition intended for use and should not assume that pellet spread or point of impact will match another shotgun of the same model.
Mossberg markets model 51689 as a “Class III” shotgun. For federal legal purposes, the firearm is classified as a short-barreled shotgun because its barrel measures less than 18 inches. It is regulated under the National Firearms Act and cannot be transferred or released in the same manner as an ordinary shotgun.
A transfer to an eligible individual or legal entity generally requires an approved ATF Form 4 and payment of the applicable $200 federal transfer tax. The firearm must remain with the transferring FFL/SOT until ATF approval has been received. The federal tax is separate from the firearm price and any receiving-dealer transfer fee.
Texas customers may complete the applicable transfer process through Huckleberry Arms. An out-of-state order must generally be transferred first to an appropriately licensed FFL/SOT in the customer's state, after which that dealer completes the Form 4 transfer to the final recipient.
Short-barreled shotguns are restricted or prohibited in some jurisdictions even when federal registration would otherwise be available. The purchaser and receiving dealer must confirm all federal, state and local requirements before ordering. Huckleberry Arms will not ship or transfer this firearm where possession is prohibited.
This configuration is intended for the buyer who specifically wants the compactness of a factory 14-inch 590A1 and is prepared to complete the NFA transfer process. It preserves the traditional Mossberg pump-action controls and fixed-stock handling while reducing overall length by several inches compared with a standard security shotgun.
A buyer who does not need the shorter barrel—or who lives where short-barreled shotguns are prohibited—will generally be better served by an 18.5- or 20-inch non-NFA Mossberg 590 or 590A1. Model 51689 is a specialized configuration whose primary advantage is its compact factory form.
Required NFA Transfer Item:
Popular Pairing:
Shop more Mossberg shotguns and 12-gauge ammunition at Huckleberry Arms: Mossberg | Shotguns | Shotgun Shells
The Mossberg 990 SPX Magpul Model 83014 is a factory-produced, gas-operated semi-automatic short-barreled shotgun chambered for 12-gauge shotshells up to 3 inches. It combines a compact 14.75-inch Accu-Choke barrel with a shoulder-fired Magpul SGA stock, SPX accessory-ready forend and optic-ready receiver.
Mossberg lists the shotgun with a 5+1 capacity when using 2.75-inch shells, a 33-inch overall length and an approximate weight of 7.35 pounds. Its shortened factory configuration provides considerably more compact handling than the otherwise similar 18.5-inch Model 83009 while retaining a conventional shoulder stock and adjustable length of pull.
Because Model 83014 has a shoulder stock and a barrel shorter than 18 inches, it is federally classified as a short-barreled shotgun regulated under the National Firearms Act. It is not transferred in the same manner as an ordinary Title I shotgun and must remain with an appropriately qualified FFL/SOT until the required ATF transfer has been approved.
Mossberg describes this model as “Class 3.” More precisely, the firearm classification is short-barreled shotgun, or SBS. “Class 3” commonly refers to the Special Occupational Tax status held by a dealer qualified to conduct business in NFA firearms; it is not a separate federal firearm category.
This is also legally distinct from a pistol-grip-only Mossberg Shockwave. Model 83014 is manufactured with a shoulder stock and is expressly identified by Mossberg as an NFA/Class 3 shotgun.
The 990 SPX uses a gas-operated system contained within the forend. Mossberg designed the system to provide smooth, consistent cycling across a range of compatible ammunition while preserving the fast follow-up capability of a semi-automatic shotgun.
Critical internal components receive corrosion-resistant treatments and specialized finishes. Mossberg specifically identifies the gas piston, magazine tube, hammer and sear among the treated components. As with any semi-automatic shotgun, ammunition should be tested in the individual firearm to confirm reliable cycling, feeding, extraction, ejection and pattern performance.
The matte-blue barrel measures 14.75 inches and uses Mossberg’s interchangeable Accu-Choke system. A Cylinder Bore choke tube is installed at the factory, giving the owner the option to use the supplied open choke or select another compatible Accu-Choke tube for an appropriate shooting application.
Choke selection should be matched to the specific ammunition. Confirm that any slug, buckshot or specialty load is suitable for the installed choke, and pattern the exact load before relying upon its point of impact or pellet distribution.
The receiver has a patent-pending optic cut that accepts Shield RMSc-footprint micro red dots directly when the rear ghost-ring sight plate is removed. Mossberg also includes three adapter plates for optics using RMR, Docter and Leupold footprints.
The included adapter plates broaden optic compatibility without requiring a conventional receiver-top rail. The receiver is also drilled and tapped. An optic is not included, and footprint terminology alone does not guarantee compatibility with every sight. Confirm the exact optic model, supplied plate, required screws, mounting clearance and manufacturer torque specification before installation.
Model 83014 arrives with a metal ghost-ring rear sight and a wing-protected fiber-optic front sight. The protective wings help shield the sights from incidental impact, while the fiber-optic front provides a highly visible aiming reference.
Removing the rear ghost-ring plate exposes the direct-mount optic cut. Mossberg designed the front sight height to support co-witness use with appropriately mounted compatible micro-dot optics.
The SPX forend provides an integrated heat shield and multiple M-LOK accessory slots for compatible lights, controls, hand stops and other equipment. Strategically positioned QD ports on the forend, stock and magazine-tube extension provide several sling-mounting options.
Accessories should be positioned so they do not obstruct the loading port, charging handle, bolt release, safety, sight picture or movement of the operating system. Confirm that mounted equipment and fasteners cannot contact the barrel, gas system or internal components.
The black Magpul SGA stock uses removable spacers to provide an adjustable length of pull from approximately 12 to 14 inches. This allows the stock to be configured for different shooters, body armor, heavy clothing or individual stance preferences.
The SGA’s conventional grip angle also works naturally with the Mossberg tang-mounted safety. Integrated QD ports and sling provisions provide additional flexibility for configuring the shotgun’s carry system.
The 990 SPX is equipped with a top-mounted ambidextrous safety with a visible red indicator, knurled charging handle and oversized paddle-style bolt release. These enlarged controls are intended to improve access during loading, unloading and operation.
An enlarged and beveled loading port, elongated pinch-resistant elevator and high-visibility anodized orange magazine follower simplify loading and help the user visually identify the follower when checking the magazine tube.
The shotgun has a 3-inch chamber and can use compatible 2.75- or 3-inch 12-gauge shotshells. Mossberg’s listed 5+1 capacity is based on 2.75-inch shells. Actual magazine capacity can vary with shell length and ammunition construction.
Use only ammunition of the correct gauge and an appropriate shell length. Never rely solely on the magazine follower, chamber indicator or position of the action to determine whether the shotgun is unloaded; physically and visually inspect the chamber, elevator and magazine tube.
Choose Model 83014 when the objective is the most compact shoulder-fired version of the 990 SPX Magpul and the purchaser is prepared to complete the NFA transfer process. It has a 14.75-inch barrel, 5+1 capacity, 33-inch overall length and approximate weight of 7.35 pounds.
The non-NFA Model 83009 uses an 18.5-inch barrel, 7+1 capacity, 37.25-inch overall length and approximate weight of 7.75 pounds. It offers two additional rounds and avoids the SBS transfer process, but it is 4.25 inches longer. The operating system, Magpul SGA stock, accessory-ready forend and multi-footprint optic system are otherwise closely related.
RUGER RED LABEL III 20 GAUGE OVER/UNDER SHOTGUN 30" (MODEL 4511) is a refined over/under built for the sporting shooter who wants classic double-gun handling paired with Ruger’s precision-machined construction and durable all-steel barrel assembly.
This 20 Gauge configuration features a 30-inch barrel, walnut stock, finely polished receiver, and blued barrel finish. Ruger also notes a single inertia trigger, a 3-inch chamber, and a hand-fitted locking system designed to maintain a tight lockup and long-term reliability even after thousands of rounds.
The barrel assembly is brazed with a matted vent rib, and the bore is listed at .615 and is smooth plated for steel shot. Ruger describes this model as an ideal sporting shotgun for upland game hunting, skeet, sporting clays, and waterfowling.
This model ships with five screw-in Tru-Choke style choke tubes: Skeet, Improved Cylinder, Modified, Improved Modified, and Full. Ruger also states it ships in a premium custom case for protection and safe storage.
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The Beretta 686 Silver Pigeon I Field Combo J686FP8 is for the shooter who genuinely wants both a 20 gauge and a 28 gauge field gun, but does not want to buy, fit, maintain, and transport two separate over/unders. It includes one fitted 686 Silver Pigeon I receiver and stock set, plus two 28-inch barrel sets: one chambered in 20 gauge for 3-inch shells and one chambered in 28 gauge for 2-3/4 inch shells. You retain the same familiar stock dimensions, trigger, safety, and handling controls while selecting the barrel set that best suits the day.
The practical advantage is flexibility rather than novelty. The 20 gauge setup gives you access to the broader selection of 20 gauge ammunition, including 3-inch loads when the situation calls for them. The 28 gauge barrel set lets you carry and shoot a classic smaller-gauge configuration without purchasing an entirely separate gun. For an upland hunter, sporting-clays shooter, or collector who expects to use both gauges, this is a more cohesive solution than owning two unrelated shotguns.
The barrel set determines the gauge, chamber length, installed choke tubes, and ammunition you use. The 20 gauge barrels are for 20 gauge 3-inch or shorter shells; the 28 gauge barrels are for 28 gauge 2-3/4 inch shells. Each set includes its own five flush Optima Choke HP tubes. Always use the correct barrel set, gauge-specific choke tubes, and appropriate ammunition together. This is a fitted combination gun, not a universal receiver for random separately sourced barrel sets.
At the shoulder, the appeal remains the same: a low-profile Beretta 686 action, single-selective trigger, tang-mounted safety and barrel selector, oil-finished walnut furniture, and a narrow field rib intended for natural wingshooting. The supplied Beretta hard case keeps both barrel sets, choke tubes, and the receiver together for protected storage and travel.
This is an especially sensible choice for the shooter who already knows he enjoys both 20 gauge and 28 gauge shooting and wants one high-quality, coordinated field-gun system. It is less compelling for someone who expects to shoot only one gauge nearly all the time; in that case, a dedicated single-gauge Silver Pigeon may be the more economical and straightforward choice. The value of the J686FP8 is having two genuinely useful small-gauge options in one matched Beretta package, ready to be selected based on the hunt, target presentation, preferred load, or simply the kind of shooting day you want.
