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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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 -
Dead Air Armament Xeno Flash Hider 5/8x24 DA122
Dead Air Armament
$75.00The Dead Air Xeno Flash Hider (DA122) with 5/8x24 thread pitch is a precision-machined muzzle device designed as the foundation of Dead Air's Xeno suppressor mounting system. The Xeno Flash Hider...$75.00 -
Heckler & Koch Three Position Retractable Buttstock 227901
Heckler & Koch
$732.50The Heckler & Koch Three-Position Retractable Buttstock (HK PN: 227901) is HK's genuine factory three-position adjustable/retractable buttstock for HK416, MR556, MR762, and compatible AR-pattern...$732.50 -
HK Heckler & Koch Fixed Side Folding Stock for SP5's 261249
Heckler & Koch
$320.00The Heckler & Koch Fixed Side Folding Stock for SP5 (HK PN: 261249) is the genuine HK factory fixed-position side folding stock for the SP5 and SP5K 9mm semi-automatic platforms. This folding stock...$320.00 -
LanTac USA M-Spec Carbine Gas Tube 01-MSPEC-GT-CRBN
LanTac
$18.99This is a new LanTac USA LLC M-Spec Carbine Gas Tube. It fits AR 15 with carbing length- gas system, comes complete with gas tube roll pin, is laser engraved, and manufactured from 306 stainless...$18.99 -
Q LLC - Mini Fix Multi Tool TOOL-MULTI-FIX
Q LLC
$69.00Q LLC Mini Fix Multi Tool TOOL-MULTI-FIX This is a handy tool to stick in your bag when hitting the range or work bench. Use it to swap your barrel, install accessories, remove your silencer,...$69.00 -
BT Atlas - V8 Atlas Bipod - BT10
BT Atlas
$299.95The BT10 V8 Atlas Bipod mounts directly to any 1913 style Picatinny rail via a low profile two screw clamp assembly. It is comprised of 6061-T6 aluminum that is Mil-Spec Type III hard coat anodized...$299.95 -
On Sale
Aimpoint - ACRO S-2™ 9 MOA - Red Dot Reflex Sight w/ Integrated Shotgun Rib Mount - 200907
Aimpoint
Now: $755.00Was: $839.00The Aimpoint ACRO S-2™ 9 MOA Red Dot Reflex Sight (Model 200907) is Aimpoint's dedicated shotgun red dot sight, purpose-built for mounting on ventilated shotgun ribs. Based on the proven Acro 2nd...Now: $755.00Was: $839.00 -
Trijicon - ACOG 1.5X16mm Dual Illuminated Green Ring & 2 MOA Dot - TA44-C-400329
Trijicon
$1,357.00The Trijicon 1.5x16S Compact ACOG® Scope (Model TA44-C-400329) is the ultimate compact riflescope for close-quarters combat, tactical teams, and speed-oriented competition. The ACOG (Advanced Combat...$1,357.00 -
Magpul - Angled Foregrip for Picatinny - MAG411-BLK
Magpul Industries
$33.20The Magpul Angled Foregrip for Picatinny Rail (MAG411-BLK) is Magpul's original angled foregrip (AFG) for MIL-STD-1913 Picatinny rail handguards. The Magpul AFG places the support hand in a natural,...$33.20 -
Magpul - MBUS Back-Up Rear Sight Gen 2 - MAG248-BLK
Magpul Industries
$55.05The Magpul MBUS Back-Up Rear Sight GEN 2 (MAG248-BLK) is Magpul's second-generation polymer flip-up rear backup iron sight for AR-15/M4 rifles. The MBUS Gen 2 Rear features a spring-loaded,...$55.05