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
Magpul - Glock OEM 9mm 24 rd Magazine - #47464
Magpul Industries
$40.00Each GLOCK magazine is constructed from a hardened steel insert encased in high tech polymer to protect the magazine and prevent deformation, even when dropped from a great height. The high quality...$40.00 -
LMT Defense - 13.5" Chrome Line 7.62 NATO Barrel - R-LM308B413
LMT Defense
MSRP: $697.00$646.20The LMT Defense 13.5" Chrome Lined 7.62 NATO MRP-H Barrel (R-LM308B413) is a mil-spec chrome-lined heavy-profile .308 barrel designed for the LMT MWS (Modular Weapon System) MRP-H upper receiver...MSRP: $697.00$646.20 -
Proof Research - 12.5" 300BLK LMT Carbon Fiber Barrel - 100523
Proof Research
$999.99The Proof Research 12.5" .300 Blackout LMT Carbon Fiber Barrel (100523) is a precision drop-in replacement barrel for LMT MRP/MWS quick-change barrel systems chambered in .300 Blackout. The 12.5-inch...$999.99 -
Out of stock
Noveske - 12.5" Leonidas Barrel 223 Rem/556NATO - #07000200
Noveske
$380.00UPC 840906111963 Manufacturer Noveske Manufacturer Part # 07000200$380.00 -
Noveske - 11.5" Commando Barrel 223 Rem/556NATO - 07000050
Noveske
$360.00The barrel ships with a gas block. This barrel is designed for our gas block that is 1″ long (INCLUDED). A standard front sight base is 1.9″ long and WILL NOT FIT. Barrel installation should be...$360.00 -
Noveske - 10.5" 556NATO Barrel 1:7 Twist Carbine Length Gas System - 07000048
Noveske
$340.00Noveske is proud to manufacture premium barrels for all types of builds. This barrel ships with gas block. This barrel is designed for the Noveske gas block that is 1" long (INCLUDED). A standard...$340.00 -
Forward Controls Design - Carbine Receiver Extension - REF
Forward Controls Design, Inc
MSRP: $70.00$66.50The Forward Controls Design Carbine Receiver Extension (REF) is FCD's precision-machined standard carbine buffer tube for AR-15/M16 lower receivers. The REF is machined to tighter tolerances than...MSRP: $70.00$66.50 -
LMT Defense - AR-15 Barrel 8.25" 300 Blackout - L7BX1B
LMT Defense
MSRP: $598.00$554.40The LMT Defense AR-15 8.25" .300 Blackout MRP-L Barrel (L7BX1B) is LMT's most compact .300 Blackout barrel assembly, designed for ultra-short SBR, AR pistol, and suppressed builds on the LMT MRP-L...MSRP: $598.00$554.40 -
Out of stock
Knight's Armament - Precision Base for Harris "S" Bipods QD for MIL-STD-1913 - 31761
Knights Armament Company
$150.00The Knight's Armament Precision QD Base for Harris "S" Bipods — MIL-STD-1913 (KAC PN: 31761) is KAC's Quick-Detach precision bipod base for mounting Harris "S"-series bipods to MIL-STD-1913 Picatinny...$150.00 -
Out of stock
Knight's Armament - Aimpoint Micro NVG High Rise Mount w/1913 - #32422
Knights Armament Company
$300.00Aimpoint Micro NVG High Rise Mount By lifting the optic up higher you can clear lights, lasers and any other items that can obstruct your sight picture. With our new Aimpoint Micro NVG mount, we push...$300.00 -
Out of stockOn Sale
Knight's Armament - 5.56 Shroud Suppressor 6" - #118957-2-FDE
Knights Armament Company
Now: $224.44Was: $236.25The KAC 6” Suppressor Shroud is engineered specifically for the CRS QDC 5.56 Suppressor. Suppressor shrouds offer multiple advantages, including reducing heat and IR signatures, minimizing mirage,...Now: $224.44Was: $236.25 -
Out of stock
Insight Technology - DOD Surplus M3X FDE Tactical Illuminator - #M3X/SU-233
Used
$400.00Insight Technologies M3X/SU-233 Light is engineered to military specifications, utilizing technology currently in use by U.S. special operations. This compact, lightweight flashlight is crafted for...$400.00