Shotgun Parts & Upgrades: Compare Prices

Last updated and checked October 29, 2026

Shotguns have one of the best aftermarkets in the gun world, and most people don’t realize it. The Mossberg 500/590 and Remington 870 have been customized for decades, and now platforms like the Benelli M4 and Beretta 1301 are getting serious aftermarket attention too. Factory pump shotguns ship bare-bones: plastic furniture, a bead sight and a stock that fits few people well. A few upgrades turn a budget pump gun into a purpose-built tool.

We compare shotgun parts from Brownells, Palmetto State Armory, MidwayUSA, Optics Planet, and 200+ other retailers. Stocks, forends, barrels, choke tubes, magazine extensions, sights, and accessories for every major platform. Filter by part type, brand, and price. Every link goes straight to the retailer.

Shotgun parts compatibility varies significantly between platforms. A Mossberg 500 stock won’t fit a Remington 870, and a Benelli forend won’t fit either of them. Check the compatibility section below before ordering.

Table of Contents

Shotgun Parts by Platform: What Fits What

Unlike the AR-15 world, where most parts are standardized, shotgun parts are platform-specific. Here’s the breakdown of the major platforms and what interchanges.

Mossberg 500 / 590 / 590A1 / Maverick 88: The most popular pump shotgun family with the deepest aftermarket. Stocks, trigger groups, safeties and sights swap between the 500 and 590. Capacity differs: Mossberg lists every 500 at 5+1, while the 590 is 6+1 with an 18.5″ barrel and 8+1 with a 20″ barrel. The 590A1 adds a heavy-walled barrel and a metal trigger guard and safety. The Maverick 88 takes 500 stocks, barrels and Accu-Choke tubes, but it has a crossbolt safety instead of the tang safety, and its forend is pinned to the action bars rather than held by a nut, so a 500 forend needs a 500 action slide tube first. Furniture labeled “Mossberg 500/590” fits both of those, not always the 88.

Remington 870: The classic American pump gun with its own complete parts ecosystem. Express, Police, and Wingmaster models share the same receiver and most parts interchange. The Police model has a heavier barrel and parkerized finish. The Wingmaster has a higher polish and smoother action. After Remington’s bankruptcy, RemArms is now producing 870s again, and aftermarket support from Magpul, Hogue, Mesa Tactical, and dozens of others never slowed down. You’ll have zero trouble finding 870 parts.

Benelli M4 / M2: Premium Italian semi-autos with a growing tactical aftermarket. Parts cost more and are harder to find than Mossberg or Remington parts, but Mesa Tactical, Aridus Industries and Nordic Components all support them. The M4 runs Benelli’s ARGO gas system, so service parts should come from Benelli. Stocks and forends are where the aftermarket shines.

Beretta 1301: The 1301 Tactical is gaining ground in the tactical semi-auto space and its aftermarket is catching up. Nordic Components makes magazine extensions and Aridus Industries makes model-specific shell carriers. Still more limited than Mossberg or Remington, but growing.

Mossberg Shockwave / Remington TAC-14: These 14-inch pump guns ship with a bird’s head grip and no stock, and Mossberg says its 14″ models do not require Federal Class III paperwork. Their parts needs are unique: grip replacements, short forends and magazine tube accessories. Do not add a shoulder stock. A gun designed to be fired from the shoulder with a barrel under 18 inches is a short-barreled shotgun under the National Firearms Act (26 U.S.C. 5845), which needs ATF registration and approval before you build it. The federal tax on making one dropped to $0 on January 1, 2026, but the registration requirement did not change.

Stocks and Forends: The First Upgrade You Should Make

If you’re still running the factory plastic furniture on a Mossberg 500, you’re leaving a better gun on the table. The stock and forend are the biggest ergonomic upgrade you can make on any shotgun. They change how the gun shoulders, how it handles recoil, and how quickly you can run it.

The Magpul SGA stock is the go-to recommendation for both Mossberg and Remington platforms. Magpul lists the Mossberg 500/590/590A1 and Remington 870 versions at $124.95. It has adjustable length of pull (LOP) via spacers, a thick rubber buttpad that absorbs recoil, and a slim profile that works for most body sizes. I’ve put SGA stocks on three different shotguns and every one shot better for it.

The Mesa Tactical Urbino is the pistol grip stock option for shooters who prefer that layout: adjustable LOP, a built-in pistol grip angle and a cheek riser for optics. Mesa lists the Remington 870 version from $134.95 to $174.95, and also makes Urbinos for Benelli and Beretta guns, but not for the Mossberg 500/590.

Hogue OverMolded stocks are the budget play. They replace factory plastic with a rubber-over-fiberglass stock that absorbs recoil better and grips more securely. Retailer listings show an $89.95 MSRP for the Mossberg 500 stock and forend kit. No adjustable LOP, but the rubber cushion makes up for it on heavy loads.

For forends, the Magpul MOE M-LOK forend ($29.95 for the 870 or the 590) adds M-LOK slots for mounting a light, which a home defense shotgun needs, and a much better grip than factory plastic. Check fit: Magpul’s 590 version does not fit the Mossberg 500, Maverick 88 or 14″ Shockwave.

Barrels and Choke Tubes: Match the Barrel to the Job

One of the great things with pump shotguns is that you can swap barrels in seconds to change the gun’s purpose: an 18.5″ cylinder bore barrel for home defense, a 28″ vent rib barrel for clays on the weekend, and a 20″ rifled barrel for deer season. Same gun, three roles.

Home defense: 18.5″ cylinder bore. The shortest common barrel that needs no NFA registration (the legal minimum is 18 inches, with a 26-inch minimum overall length under 26 U.S.C. 5845, so 18.5″ gives you a margin). Cylinder bore means no choke restriction and the widest pattern at close range. This is what most tactical shotguns ship with.

Hunting/clays: 26″ to 28″ vent rib with choke tubes. Longer barrels provide a smoother swing and better sight picture on moving targets. Interchangeable choke tubes let you tighten or open the pattern depending on the game: improved cylinder for close decoying birds, modified for general purpose, full for long-range pass shooting.

Slugs/deer: 20″ rifled or rifled sight barrel. Rifled barrels stabilize sabot slugs for significantly better accuracy at distance. Rifle sights or a scope mount make precise shot placement possible out to 100+ yards.

Critical choke tube note: Choke tube threads are not universal. Mossberg uses Accu-Choke (and Accu-Mag on the 835, 935 and SSi-One). Remington uses RemChoke. Benelli field guns such as the SBE3, M2, Montefeltro and Ethos use Crio, but the M4 takes standard Mobil-style tubes. Current Berettas like the 1301, A300 and A400 use Optima-HP, and older Berettas use Mobilchoke. Aftermarket makers like Carlson’s, Briley and Trulock make chokes for all major thread patterns, but you must buy the right thread. The wrong tube can damage your barrel.

Magazine Extensions, Sights, and the Small Upgrades That Matter

The small upgrades on a shotgun make the biggest practical difference for the least money. Magazine capacity, sight acquisition speed and ammo management are where a few dollars go a long way.

Magazine tube extensions add rounds to your shotgun’s capacity. Nordic Components makes the gold standard: machined aluminum extensions sized +1 and up. Check fit before you order: Nordic’s fit guide says its system fits the Mossberg 590 and 590A1 but not the 500, 535 or Maverick 88, and the $76.65 tube kit needs a separate $44.95 nut, $121.60 in all. GG&G and Choate are also solid options. Most extensions need a longer magazine spring, which is not always in the kit. And always check your state’s capacity laws before adding rounds.

Sights are underrated on shotguns. The factory bead on most pump guns is fine for bird hunting but poor for defensive use. XS Big Dot tritium sights ($39.99 to $66.94) give fast acquisition in any light, and XS ghost ring sets run $114.99 to $196.72. Hi-Viz fiber optic front sights are bright and cheap. For a full defensive package, a ghost ring rear with a fiber optic or tritium front gives you the fastest, most precise sight picture on a smoothbore.

High-visibility followers are a cheap upgrade that improves reliability. The orange or yellow follower replaces the factory black one in your magazine tube and is less likely to tilt and jam. Vang Comp‘s follower is $25, and S&J Hardware makes good ones too. It’s the cheapest meaningful upgrade you can make on a pump shotgun.

Side saddles and shell carriers keep extra rounds on the gun for fast reloads. Mesa Tactical SureShell carriers are the most popular, mounting to the receiver with aluminum hardware: $79.95 to $109.95 for the Mossberg 500/590A1 and Maverick 88, $59.95 to $99.95 for the 870. Aridus Industries QDC carriers detach quickly, but buy the model-specific version ($185); Aridus does not recommend its universal carrier for the 870 or 500/590. Esstac shotgun cards ($13 to $22) are a light, flexible alternative. Any of these beats loose shells in a pocket.

Triggers: Not a common upgrade on shotguns, and most people don’t need one. Factory triggers are fine for their intended purpose. For 3-gun or competitive shotgun sports, Timney’s Remington 870 Trigger Fix ($99.99, a sear and three springs) cleans up the 870’s pull. Timney does not make a shotgun trigger for the Mossberg 500/590.

Where to Buy Shotgun Parts Online

Brownells has the deepest shotgun parts catalog of any online retailer, from complete barrels to individual springs and detents, and its tech resources and installation guides are useful. Palmetto State Armory runs frequent sales on Magpul shotgun furniture and accessories. MidwayUSA is strong on choke tubes, cleaning supplies and small parts.

Sportsman’s Warehouse is a good option if you want in-store pickup, with a solid selection of shotgun barrels and stocks from major brands.

The price comparison grid above pulls from all of these and 200+ other retailers. Shotgun parts prices vary widely between stores, especially on barrels and magazine extensions, so let the grid do the work. See our cheapest online gun stores for which stores run the lowest prices.

How to Not Screw Up Your First Shotgun Build

A few hard-won lessons from building out more pump shotguns than I care to admit.

Check thread patterns before buying chokes. I cannot stress this enough. Accu-Choke, RemChoke, Crio, Mobilchoke, and Optima are all different. Installing the wrong choke tube will damage your barrel threads. Verify your gun’s choke system before ordering.

Mossberg 500 forend nuts need a specific wrench. It’s not a standard socket. Use a forend nut wrench or a deep thin-wall socket that fits the nut without marring it. Brownells’ Remington/Mossberg forend wrench runs $33.67 to $40.99; buy it before you start.

Magazine extensions need longer springs. Not all extension kits include the longer spring you need. If the spring is too short, the follower won’t push the last round or two reliably. Always verify the kit includes a spring, or buy one separately.

Loctite your side saddle screws. Side saddles mount to the receiver with small screws that will walk loose under recoil if you don’t use threadlocker. Blue Loctite (not red). Apply it during installation and you’ll never have to retighten them.

Function-check after every barrel swap. Before loading live ammo, manually cycle the action several times with the new barrel installed. Make sure the locking lug engages fully, the action opens and closes smoothly, and the barrel is seated properly. This takes 30 seconds and prevents problems at the range.

Related guides: best Mossberg 500 parts and accessories, best Benelli M4 parts and accessories, best pump action shotguns, best shotguns under $500, slugs vs buckshot for home defense and the full gun parts hub.

Facts and Figures

• Mossberg capacity: every 500 is 5+1; the 590 is 6+1 (18.5″) or 8+1 (20″)
• Legal minimums: 18-inch barrel and 26-inch overall length; shorter needs NFA registration
• Choke threads: Mossberg Accu-Choke, Remington RemChoke, Benelli Crio (M4: Mobil-style), Beretta Optima-HP or Mobilchoke
• Upgrade list prices: Vang follower $25, Magpul MOE forend $29.95, XS Big Dot from $39.99, Magpul SGA $124.95, Mesa Urbino (870) from $134.95
• Fit traps: Nordic extensions do not fit the Mossberg 500 or Maverick 88; Magpul’s 590 forend does not fit the 500 or 88

Frequently Asked Questions