Gun Parts
Welcome to the Gun Parts superstore at Boss Firearms Company, LLC. Whether you are undertaking a custom precision build, performing routine armorer maintenance, or upgrading an existing platform, we stock the high-performance components you need. As an authorized dealer for premium OEM and aftermarket manufacturers, we provide everything from stripped receivers and match-grade triggers to enhanced bolt carrier groups (BCGs) and duty-ready barrels for rifles, handguns, and shotguns.
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Out of stockOn Sale
Law Tactical - AR-15/M16 Gen3-M Folding Stock Adapter - #99312
Law Tactical
Now: $239.99Was: $269.99Law Tactical's steel adapter enables installation of a folding stock on any AR-15 to create a smaller-profile rifle for easy deployment from a vehicle or transport in non-permissive environments...Now: $239.99Was: $269.99 -
Out of stock
SilencerCo - Bravo ASR Mount - #AC824
SilencerCo
$162.00The Bravo (ASR) Active Spring Retention Mount is a quick attached / detach system for your suppressors that pairs with the ASR Flash Hider, ASR Closed-Tine Flash Hider, ASR Muzzle Brake, and ASR...$162.00 -
Out of stock
Modern Outfitters - Modern Carbine MC5 Complete Upper Receiver 300BLK - USED
Used
$255.00 - $275.00Police trade-in Modern Carbine MC5 Upper Receivers, 16" 300 Blackout available in Good and Blemished. There's also one in FDE. Modern Carbine™ Forged from 7075-T6 Aluminum and CNC Machined to...$255.00 - $275.00 -
Out of stock
Forward Controls Design - Castle Nut A5 - #CN5F
Forward Controls Design, Inc
$22.80CN5F (Castle Nut, A5, Forward Controls) is an extended version of CNF we've been making since 2018. CN5F is designed specifically for the superb Vltor A5 system, CN5F is 0.1" longer, and is as long...$22.80 -
Out of stock
Glock - UTM G19 Gen 5 MMR/TBR Conversion Kit w/2 Mags + Ammo Bundle - 01-4110
Glock
$200.00This is a used like new UTM (Ultimate Training Munitions) Glock 19 Gen 5 MMR/TBR Conversion Kit slide that is bundled with one 50-round box of UTM man marker training rounds and two Glock OEM...$200.00 -
Out of stockOn Sale
American Defense - Like New Scope Mount - 1312-Recon-S-Like-New
American Defense MFG
Now: $162.00Was: $180.00These are in like-new condition, they were new rifle takeoffs. The AD-RECON-S mount is made for putting high power glass onto a flattop style AR-10, Galil, Bolt Action Rifles, and Lever Action...Now: $162.00Was: $180.00 -
Out of stockOn Sale
American Defense - Like New Scope Mount - 1316-Recon-SL-Like-New
American Defense MFG
Now: $162.00Was: $180.00These are in like-new condition, they were new rifle takeoffs. Similar to the AD-RECON-S, the AD-RECON-SL mount is made for putting high power glass onto a bolt action rifle, M1A, M-14 or 10/22's...Now: $162.00Was: $180.00 -
Out of stock
Knights Armament - Like NewSR-15 Ambidextrous Charging Handle Assembly - 31177-Like-New
Knights Armament Company
$178.20The KAC 5.56mm Ambidextrous Charging Handle is another step forward in the effort to deliver the most ergonomic firearm accessories to the end user. Intermediate sized latch pads are easily...$178.20 -
Out of stock
Heckler & Koch - Like New MR556/AR-15 5.56x45mm 30-Round Magazine - 251770S-Like-New
Knights Armament Company
$30.00The Heckler & Koch 30-Round Steel Magazine is the top choice for AR-15 magazines, designed for use with the H&K Model 416 and MR556. It ensures optimal ammunition feeding for any M16/M4/AR-15-style...$30.00 -
Out of stock
Knight's Armament - Like New SR-25 Charging Handle - 31046
Knights Armament Company
$150.00The KAC 7.62mm Charging Handle represents a significant advancement in providing users with ergonomic firearms and accessories. Its intermediate-sized latch pads are designed for easy access,...$150.00 -
Out of stock
Sig Sauer - 7.62x39 PMCX Upper Receiver + Magazine - #PMCX-762R-11B-LT-B-UPPER
Sig Sauer
$1,250.00The MCX-SPEAR LT introduces the much-anticipated 7.62×39 caliber to the MCX lineup. Equipped with a new latch system and an 11.5" threaded barrel the 7.62×39 MCX-SPEAR LT is designed to accommodate a...$1,250.00 -
Out of stockOn Sale
Knight's Armament - 5.56 Shroud Suppressor 6" - Black - #118957-2
Knights Armament Company
MSRP: $236.25Now: $224.44Was: $236.25The KAC 6” Suppressor Shroud is engineered specifically for the CRS QDC 5.56 Suppressor. Suppressor shrouds offer multiple advantages, including reducing heat and IR signatures, minimizing mirage,...MSRP: $236.25Now: $224.44Was: $236.25