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
BT Atlas - PSR Atlas Bipod Standard Height w/ADM 17-S lever - BT46-LW17
BT Atlas
$459.95The BT46-LW17 PSR (Precision Sniper Rifle) Atlas Bipod mounts directly to any 1913 style Picatinny rail via the included ADM-170-S lever. It is comprised of 6061-T6 aluminum, except the strengthened inner legs which are made from 7075-T6 aluminum...$459.95 -
Out of stock
LMT Defense 5.56 Full Auto Piston Bolt Carrier Group - L7D3CP
LMT Defense
$468.00This is a new Lewis Machine & Tool 5.56 piston AR15 bolt carrier group for use in piston-operated systems. It features optimization for use in short-barreled rifles.$468.00 -
Out of stockOn Sale
B5 Systems - Type-23 P Polymer Grip - Coyote Brown - Milspec AR - #PGR-1126
B5 Systems
MSRP: $20.00Now: $19.00Was: $20.00This is a new B5 Systems Type 23 P grip compatible with AR pattern firearms. The B5 Systems Type 23 P-Grip offers an increased vertical grip angle and extended tang to improve ergonomics and ensure proper trigger index. Proudly made in the USA...MSRP: $20.00Now: $19.00Was: $20.00 -
Out of stockOn Sale
B5 Systems SOPMOD Stock Assembly AR Milspec - Coyote #SOP-1076
B5 Systems
Now: $95.00Was: $100.00This is a new B5 Systems SOPMOD stock assembly compatible with AR pattern buffer tubes. The SOPMOD features color-matched steel hardware, no slip-cushioned buttpad, and dual water-resistant storage compartments. The SOPMOD is made of Mil-Spec materials...Now: $95.00Was: $100.00 -
Out of stock
Radian Weapons - Guardian Optic Guard Glock MOS TJ RMR - #G1001
Radian Weapons
$129.95The Radian GUARDIAN Optic Mounting System provides unprecedented protection for your pistol red dot optic. Machined from 7075 aluminum & hard anodized, the design provides top/ front/side impact protection. Optional back-up sights, provide an...$129.95 -
BT Atlas - V8 Atlas Bipod - BT10-NC
BT Atlas
$299.95The BT10-NC V8 Atlas Bipod “No Clamp” model has a two hole pattern of 1.100” with the holes being 10/32 threads. It requires any 17S size lever style mount such as the ADM-170-S, ARMS 17S, LT271 or any ARCA dovetail mount with the...$299.95 -
Spuhr - 30mm Picatinny Mount 0 MOA - 1.181" - SP-3001M
Spuhr
$515.00SP-3001 - Mount for Picatinny Rail Ring Size: 30mm Tilt: 0 MIL/0 MOA Height: 30mm(1.181in) Length: 126mm(4.96in) Durability Prevents damage on scope due to flexing during heavy recoil or rough environment. The snipers rifle...$515.00 -
Unity Tactical - Fast Omni Magnifier Mount - FST-OMB
Unity Tactical
$264.00The Unity Tactical FAST Omni Magnifier Mount (FST-OMB) is a premium magnifier mount designed to position EOTech/Aimpoint-compatible 3x and 5x magnifiers at the optimal 2.26" bore-to-optic height behind a holographic or red dot sight on an AR-15. The FAST...$264.00 -
Out of stockOn Sale
LMT Defense - Semi Safety Selector - LMP092
LMT Defense
Now: $38.25Was: $42.50Lewis Machine & Tool semi safety selector switch. The Lewis Machine and Tool AR-15 Safety Selector is built to Mil-Spec for compatibility with all lower receivers. Machined from steel and black hardcoat anodized, this semi-auto safety selector...Now: $38.25Was: $42.50 -
Out of stockOn Sale
LMT Defense - 5.56mm 20" Chrome Lined MRP Barrel Assembly - L7RA1B
LMT Defense
Now: $538.20Was: $554.4020″ Chrome Lined 5.56×45 (.223) 1:7″ RH twist barrel Designed for the LMT monolithic receiver, this barrel utilizes a low profile gas block, rifle length straight gas tube, and A2 birdcage for reduced flash. The barrel is coated...Now: $538.20Was: $554.40 -
Out of stockOn Sale
LMT - 9″ 300blk Barrel w/ A2 Flash Hider - #L7BW1B
LMT Defense
MSRP: $598.00Now: $538.20Was: $598.00The 9″ MRP .300BLK barrel is made from high-quality materials with a 1:7 twist for superior accuracy. It features a low-profile gas block firmly attached to prevent leakage or slipping and a straight gas tube that perfectly interfaces with the MRP...MSRP: $598.00Now: $538.20Was: $598.00 -
Forward Controls Design - SIG MCX Enhanced Mag Release Button - EMR-MCX
Forward Controls Design, Inc
MSRP: $30.00$28.50The Forward Controls Design SIG MCX Enhanced Magazine Release Button (EMR-MCX) is FCD's drop-in enhanced magazine release designed specifically for the SIG Sauer MCX and MPX rifle platforms. The EMR-MCX replaces the factory magazine release button with...MSRP: $30.00$28.50