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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Forward Controls Design - MARS-H Pivot and Take Down Pins Set - PF-040
Forward Controls Design, Inc
MSRP: $40.00$38.00The Forward Controls Design MARS-H Pivot & Takedown Pins Set (PF-040 MARS-H) is FCD's precision enhanced pivot and takedown pin set specifically dimensioned for the LMT MARS-H (heavy/.308/AR-10) large-frame lower receivers. These pins are machined to...MSRP: $40.00$38.00 -
Forward Controls Design - Augmented Bolt Catch - ABC-R V3
Forward Controls Design, Inc
MSRP: $62.00$58.90The Forward Controls Design Augmented Bolt Catch — ABC/R V3 (ABC/R v3) is FCD's purpose-designed enhanced bolt catch and release for AR-15/M16 receivers equipped with ambidextrous magazine releases. The ABC/R (Augmented Bolt Catch/Release, Forward...MSRP: $62.00$58.90 -
Radian Weapons - AR15 Extended Bolt Catch R0323
Radian Weapons
$29.95The Radian EBC is an enhanced bolt catch to increase the user's access to the bolt lock and release function. Features enlarged paddles and non-slip grooves for ease of manipulation.$29.95 -
Out of stock
VLTOR - SCAR Folding Stock - #VSS-11
Vltor Weapon Systems
$109.95This replacement module for the FN SCAR incorporates the same battle-proven enhancements from the VLTOR modstocks. The buttpad has been re-shaped to include a negative pitch for a more natural transition to the ready position. Storage space, QD sling...$109.95 -
VLTOR - 5-Position AK47 Receiver Extension w/ Storage Compartment - RE-47
Vltor Weapon Systems
MSRP: $98.95$98.06The VLTOR RE-47 5-Position AK47 Receiver Extension with Storage Compartment allows AK-47 pattern rifles to accept AR-15/M4 compatible collapsible stocks with a 5-position length-of-pull adjustment. The RE-47 attaches to the AK receiver and provides a...MSRP: $98.95$98.06 -
VLTOR - 5-Position AR-15 Receiver Extension - RE-1
Vltor Weapon Systems
$51.95The VLTOR RE-1 5-Position Receiver Extension is a mil-spec diameter carbine buffer tube replacement for AR-15/M4 pattern rifles, providing the standard 5-position length of pull adjustment range in a high-quality, precision-machined tube. VLTOR's...$51.95 -
Out of stockOn Sale
Forward Controls Design - SIG MCX Ambidextrous Charging Handle - Black - #ACF-MCX
Forward Controls Design, Inc
MSRP: $120.00Now: $102.00Was: $114.00ACF-MCX is closely based on the AR15/M16 version of the original ACF. Like the factory SIG MCX charging handle, MCX-ACF has two latches. Design objectives: 1. A stronger, more durable ambidextrous charging handle that can withstand repeated mortaring. 2...MSRP: $120.00Now: $102.00Was: $114.00 -
Out of stockOn Sale
SONS OF LIBERTY GUN WORKS - A5 BUFFER SYSTEM - #A5KIT
Sons of Liberty Gunworks
MSRP: $159.00Now: $151.00Was: $151.05The A5 System is the best buffer system on the market and their kit makes it even better with the inclusion of a Sprinco Green Spring, and B5 Systems End plate. Increase lock time and decrease felt recoil with the A5 buffer system for your next build...MSRP: $159.00Now: $151.00Was: $151.05 -
Q LLC - Cherry Bomb Muzzle Break - 5/8X24 - 7.62MM CB-5/8-24
Q LLC
$100.00The Cherry Bomb by Q is a Quickie Fast-Attach muzzle brake compatible with the THUNDER CHICKEN and trash PANDA silencers by Q. It features their taper mount shoulder to align with their barrels and silencers, uses a 1/2 inch socket on the front for...$100.00 -
Sig Sauer - Polymer 9mm Magazine for MPX - 35 Rounds - 8901025
Sig Sauer
$49.99The Sig Sauer MPX 9mm 35-Round Polymer Magazine (8901025) is a factory-original, high-capacity magazine for the Sig Sauer MPX pistol-caliber carbine and pistol system. This 35-round polymer magazine provides maximum magazine capacity for competitive...$49.99 -
Out of stock
Sig Sauer - MPX G2 8" Barrel - 9MM - #CALX-MPX-8B-9-G2
Sig Sauer
$699.99Sig Sauer MPX G2 9mm Cal-X Kit, 8" Barrel. Produced from sturdy steel, this assembled Cal-X kit barrel is for the MPX G2 platform of rifle/pistols chambered in 9mm. The barrel features a length of 8" and has a black coated finish. Kit up, dress up, or...$699.99 -
On Sale
Magpul Enhanced Trigger Guard Fits AR-15 Drop In Aluminum, Black MAG015-BLK
Magpul Industries
Now: $21.80Was: $22.95The Magpul Enhanced Trigger Guard — Aluminum, Drop-In (MAG015-BLK) is Magpul's billet aluminum enhanced trigger guard for AR-15/M4 pattern lower receivers. The Magpul Enhanced Trigger Guard replaces the standard hinged mil-spec trigger guard with a...Now: $21.80Was: $22.95