Parts & Accessories
Shop AR-15 and AR-10 parts and accessories from Boss Firearms. Our parts inventory includes LMT upper and lower receivers, Proof Research carbon fiber barrels, Forward Controls Design components, Geissele triggers, Magpul furniture, BCM parts, SureFire lights, and much more. Whether you're building a new rifle or upgrading your current setup, we carry the hard-to-find components trusted by military, law enforcement, and serious civilian shooters.
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Out of stock
Criterion CORE Series 300 AAC Blackout AR-15 Barrel 10.5" #300B-10CR3
Criterion
$329.99The Criterion CORE Series is an ideal pairing for the versatile .300 AAC Blackout cartridge. The modern taper improves on government contours, eliminating harsh diameter variations and adding...$329.99 -
Out of stock
Noveske SPR 6MM ARC 18" Barrel 1:7 Twist Rifle-Length Gas System #07000433
Noveske
$615.00The Noveske 18" SPR stainless barrel in 6mm ARC features a 1:7 twist rate and a rifle-length gas system with a low-profile configuration. It is threaded 5/8x24, includes a headspaced bolt, pinned gas...$615.00 -
FCD Forward Controls Design Bolt Carrier Group Serrated SBCG-N-S
Forward Controls Design, Inc
$220.00The Forward Controls Design Bolt Carrier Group — Serrated (SBCG-N-S) is FCD's Secure-Staking BCG with nitride finish and serrated texture on the bolt carrier body. The SBCG-N-S (Secure-Staking BCG,...$220.00 -
FCD Forward Controls Design Bolt Carrier Group Dimpled SBCG-N-D
Forward Controls Design, Inc
$220.00The Forward Controls Design Bolt Carrier Group — Dimpled (SBCG-N-D) is FCD's Secure-Staking BCG with nitride finish and dimpled texture machined into the bolt carrier body. The SBCG-N-D...$220.00 -
VLTOR Receiver Extension 6 Position RE-10-A5SR
Vltor Weapon Systems
$56.66The VLTOR Receiver Extension 6-Position (RE-10-A5SR) is a specialized receiver extension providing 6-position adjustability for use with the VLTOR A5 buffer system or standard AR-10/SR-25 pattern...$56.66 -
Out of stock
Remington 870 Super Mag Receiver Assembly 2.75"-3" 12ga w/ Mag Tube
Remington
$100.00This is a Remington 870 Super Mag stripped receiver assembly compatible with 2.75” – 3.5” 12ga components. This receiver was removed from factory new firearms and the serial number shown in the above...$100.00 -
Out of stock
Remington 870 Magnum Receiver Assembly 2.75"-3" 12ga w/Mag Tube
Remington
$75.00This is a Remington 870 Magnum stripped receiver assembly compatible with 2.75” – 3” 12ga components. This receiver was removed from factory new firearms and the serial number shown in the above...$75.00 -
Out of stock
Volquartsen - Mini Mamba LLV for Ruger MK IV 22LR 3" #VC4LLV-0025
Volquartsen
$502.00This is a new Volquartsen Mini Mamba 3” upper receiver compatible with all Ruger Mark IV & Mark IV 22/45 pattern components. This upper will not ship with a bolt assembly. This upper has it all for...$502.00 -
Out of stock
FCD Forward Controls Design 5.56 Bolt Catch Dimpled ABC/R v3 AA
Forward Controls Design, Inc
$58.90The Forward Controls Design ABC/R v3 Dimpled 5.56 Bolt Catch (ABC/R v3 AA) is the dimpled-texture (all-around/AA) variant of FCD's ABC/R v3 Augmented Bolt Catch for AR-15/M16 receivers. The...$58.90 -
FCD Forward Controls Design Ambidextrous Charging Handle LPVO #ACF-L
Forward Controls Design, Inc
$118.75This is a new FCD (Forward Controls Design) Ambidextrous Charging Handle. ACF-L is an AR15/M16 ambidextrous charging handle based on our ACF. Whereas with the ACF, we kept the T handle nearly the...$118.75 -
Dead Air Armament Key Mount Muzzle Brake 45 Caliber 5/8x24 DA161
Dead Air Armament
$75.00The Dead Air Key Mount Muzzle Brake (DA161) in .45 caliber with 5/8x24 thread pitch is a precision-machined muzzle device that combines functional recoil reduction with Dead Air's KeyMo quick-detach...$75.00 -
Dead Air Armament KeyMicro Flash Hider 5/8x24 9mm DA116
Dead Air Armament
$75.00The Dead Air KeyMicro Flash Hider (DA116) with 5/8x24 thread pitch is a compact muzzle device purpose-built for 9mm pistol-caliber carbines and suppressor hosts. Designed as the mounting adapter for...$75.00