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
Larue - T-2 QD Mount Lower 1/3 Co-Witness - #LT660-USED-DR
Used
$75.00This is a used LaRue Tactical LT-660 Aimpoint Micro QD Mount. Like all LaRue mounts, they are precision-machined out of bar-stock aluminum and matt black anodized to provide a durable non-reflective surface finish. The locking LaRue Speed Lever provides...$75.00 -
Out of stock
Larue - F.U.G. QD Forward Grip - #LT690-USED-DR
Used
$50.00This is a used LaRue Tactical LT-690 Forward Universal Grip (FUG), an AR battle grip designed to enhance weapon control with precision and reliability. Crafted with utmost attention to detail, this grip ensures optimal performance in any shooting...$50.00 -
Out of stock
Harris Bipod - Hinged Bipod 6"-9" w/ Larue LT706 QD Mount - #S-BRM -LT706-USED-DR
Used
$100.00Used Harris Bipod S-BRM + LaRue LT706 combo. This product combines the excellent swiveling Harris S-BRM 6"-9" bipod with an integral, low-profile LaRue QD lever mount. We have replaced the Harris OEM stud attachment base with a custom chassis.....$100.00 -
Out of stock
Sig Sauer - MCX Spear LT 9" 300BLK Barrel and Gas Block Assembly - #8901315
Sig Sauer
$899.99Sig Sauer 9” complete stainless steel barrel and gas block assembly compatible with MCX SPEAR LT pattern firearms chambered in .300 Blackout. *Please Note: All NFA rules apply to the installation of these upper assemblies to lower...$899.99 -
Out of stock
Proof Research - 6 ARC Carbon Fiber Threaded Barrel 16" - #128657
Proof Research
$1,049.00Proof Research 6 ARC barrels are impressively lightweight, offering up to a 64% weight reduction compared to standard steel barrels. Engineered to handle extreme temperatures. Staying cooler significantly extends their lifespan. Encased in...$1,049.00 -
Out of stock
Trijicon - Reflex 1x42 Dual Illuminated Sight w/ ARMS #15 Reflex Mount - #RX34-USED
Used
$475.00Trijicon’s technologically advanced Reflex sights offer shooters the perfect combination of speed and precision under virtually any lighting conditions. The Trijicon advantage includes- A bright aiming point in low light, no or bright light Quick...$475.00 -
Dead Air Armament - KeyMo Flash Hider 5/8x24 RH - DA302
Dead Air Armament
$89.00The Dead Air Armament KeyMo Flash Hider 5/8x24 RH (DA302) is Dead Air's KeyMo muzzle device for .308/7.62mm and larger calibers with 5/8x24 RH threading. Functions simultaneously as an effective flash hider and the mounting interface for Dead Air...$89.00 -
On Sale
AB Suppressor - Raptor Flush Mount F22-FM
AB Suppressor
MSRP: $85.00Now: $75.00Was: $85.00The AB Suppressor Raptor Flush Mount F22-FM is the dedicated flush mount muzzle device host for the AB Suppressor F22 / Raptor series suppressor system for .22 LR platforms. The flush mount design positions the suppressor with minimal overhang past the...MSRP: $85.00Now: $75.00Was: $85.00 -
Out of stock
Sig Sauer - MCX/MPX Folding Stock Magpul SL-K Stock - #8900516
Sig Sauer
$249.99This assembly includes everything you need to add or replace your MPX or MCX stock with a folding buffer tube and the Magpul SL-K Stock. Fits MPX/MCX Platform Magpul SL-K Stock Side Folding 1913 Picatinny Compatible$249.99 -
Out of stock
Badger Ordnance - AR-15 Gas Block MK12 .750 Steel Black - #093000026
Badger Ordnance
$78.99This slim, low-profile replacement for factory front sight gas blocks is designed to provide clearance for optics and free-float handguards. Included with the gas block are set screws, a gas tube mounting pin, and installation instructions. The Mk 12...$78.99 -
On Sale
Garmin - XERO C1 PRO - 0100261810
Garmin
MSRP: $923.98Now: $599.99Was: $923.98Whether you're handloading for the range or building arrows for the hunt, the Xero C1 Pro chronograph provides the speed data you need to hone your craft. At the size of a deck of cards the chronograph will reliably pick up your shots at velocities from...MSRP: $923.98Now: $599.99Was: $923.98 -
Geissele Automatics - 30mm 1.54" AR-15 SOPMOD Vortex 1-6x Mount - 100025597
Geissele Automatics
$279.99This AR-15 Scope Mount is part of the Geissele® SOPMOD Certified Series, designed for use by elite military and counter-terrorism units within the U.S. Special Operations Command (USSOCOM). The SOPMOD program enables Special Operations forces to...$279.99