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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Geissele Automatics - MK4 Federal 10" MLOK AR-15 Rail - 05-430S
Geissele Automatics
$408.00This is the same rail used to fullfill contracts for the Federal Bureau of Investigation (FBI). It's strength, modularity and M-Lok compatibility gives users the capabilities needed to successfully...$408.00 -
On Sale
Surefire Turbo Scout Light Pro 1000 Lumen Flashlight - M640DFT-BK-PRO
Surefire
MSRP: $409.00Now: $377.00Was: $409.00The SureFire Turbo Scout Light Pro 1000 Lumen Weapon Light (M640DFT-BK-PRO) is SureFire's premium Scout Light Pro featuring a Turbo head for an ultra-focused, long-throw beam at 1,000 lumens. The...MSRP: $409.00Now: $377.00Was: $409.00 -
On Sale
Surefire XR1 800 Lumen Rechargeable Weapon Light - XR1-A
Surefire
MSRP: $449.00Now: $404.00Was: $449.00The SureFire XR1 800 Lumen Rechargeable Weapon Light (XR1-A) is SureFire's rechargeable compact weapon light featuring two output levels (800 lumens high / 25 lumens low) and an integrated recharging...MSRP: $449.00Now: $404.00Was: $449.00 -
Heckler & Koch - MP5/SP5 9mm 30rd Magazine - 50223552-FDE
Heckler & Koch
$85.99The Heckler & Koch MP5/SP5 9mm 30-Round Magazine — FDE (HK PN: 50223552-FDE) is the genuine HK factory 30-round 9mm double-stack magazine for the MP5 and SP5/SP5K platforms, finished in FDE (Flat...$85.99 -
B5 Systems - Modular Platform Stock - Black - MPS-1553
B5 Systems
MSRP: $200.00$190.00The B5 Systems Modular Platform Stock (MPS) in Black (MPS-1553) is the full-featured flagship stock from B5 Systems, providing complete adjustability and functionality for AR-15 platforms. The MPS...MSRP: $200.00$190.00 -
B5 Systems - Modular Platform Stock - Coyote Brown - MPS-1555
B5 Systems
MSRP: $200.00$190.00The B5 Systems Modular Platform Stock (MPS) in Coyote Brown (MPS-1555) is B5's most versatile and full-featured adjustable AR-15 stock, designed for precision shooters, military, and law enforcement...MSRP: $200.00$190.00 -
On Sale
Surefire - G2X Tactical Single-Output LED 600 Lumen Flashlight - G2X-C-BK
Surefire
MSRP: $99.00Now: $89.00Was: $99.00The SureFire G2X Tactical Single-Output LED Flashlight — 600 Lumens (G2X-C-BK) is SureFire's G2X Tactical model featuring a high-performance LED with 600-lumen output and a single constant-on...MSRP: $99.00Now: $89.00Was: $99.00 -
Arisaka Defense - Side Light Mount - SSM-P
Arisaka
$45.00The Patented Arisaka Side Scout Mount (SSM) is designed for use with Surefire Scout Lights, the Modlite PLH and OKW weapon lights, the Arisaka 300, 600 and 18650 Series, and the Streamlight Protac...$45.00 -
Knight's Armament - 2-Rib Picatinny Rail Panel - Black - 97164
Knights Armament Company
$27.99The Knight's Armament 2-Rib Picatinny Rail Panel — Black (KAC PN: 97164) is KAC's compact 2-rib polymer rail panel for covering short unused sections on KAC RAS Picatinny quad-rail handguards. The...$27.99 -
Heckler & Koch - HK P30/VP9 9mm 20rd Steel Magazine - 50256715
Heckler & Koch
$64.99The Heckler & Koch P30/VP9 9mm 20-Round Steel Magazine (HK PN: 50256715) is the genuine HK factory extended 20-round 9mm magazine for the HK P30 and VP9 pistol platforms. The extended 20-round...$64.99 -
LMT Defense - 410 SS Washer w/ Nitride - 5.56 - L7S1WAS
LMT Defense
MSRP: $5.40$4.86The LMT Defense MRP Locking Screw Washer for MRP-L 5.56 (L7S1WAS) is the genuine OEM replacement locking screw washer for LMT's MRP-L (light/AR-15) Monolithic Rail Platform upper receivers. This...MSRP: $5.40$4.86 -
LMT Defense - 5.56 NATO 16" Stainless Steel Barrel Assembly - L7SB1B
LMT Defense
MSRP: $893.00$828.00The LMT Defense 16" Stainless Steel 5.56 NATO MRP-L Barrel Assembly (L7SB1B) is a premium match-quality barrel designed for LMT's MRP-L Monolithic Rail Platform upper receivers. Machined from...MSRP: $893.00$828.00