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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Heckler & Koch - VP9 Optics Ready Cleaning Mat - 17" x 11" HKVP9CGGCM
Heckler & Koch
$39.99The Heckler & Koch VP9 Optics Ready Cleaning Mat — 17" x 11" (HKVP9CGGCM) is an officially licensed HK VP9-themed gun cleaning mat from Cerus Gear featuring the HK VP9 pistol parts diagram printed in...$39.99 -
Heckler & Koch - USP Cerus Gear Gun Cleaning Mat - 12" x 17" HKUSPCGGCM
Heckler & Koch
$39.99The Heckler & Koch USP Cerus Gear Gun Cleaning Mat — 12" x 17" (HKUSPCGGCM) is an officially licensed HK USP-themed cleaning mat from Cerus Gear. The 12" x 17" neoprene mat features the HK USP pistol...$39.99 -
Heckler & Koch - Soft Pistol Case - 10" x 7.5" - Tan - HK95001038
Heckler & Koch
$39.99The Heckler & Koch Soft Pistol Case — 10" x 7.5" — Tan (HK PN: HK95001038) is HK's official soft-sided pistol storage and transport case for full-size and compact HK handguns. The Tan case provides...$39.99 -
Forward Controls Design - Adjustable Turret Cap, Aimpoint Micro T1/T2 - ATA
Forward Controls Design, Inc
MSRP: $50.00$47.50The Forward Controls Design Adjustable Turret Cap for Aimpoint Micro T1/T2 (ATA) is FCD's precision-machined replacement turret cap for Aimpoint Micro T-1 and T-2 red dot sights. The ATA (Adjustable...MSRP: $50.00$47.50 -
Forward Controls Design - Heavy Rail Mounted Fixed Loop Sling Adapter - RSF-H
Forward Controls Design, Inc
MSRP: $68.00$64.60The Forward Controls Design Heavy Rail Mounted Fixed Loop Sling Adapter (RSF-H) is FCD's billet steel, heavy-duty fixed loop sling adapter that mounts directly to any MIL-STD-1913 Picatinny rail...MSRP: $68.00$64.60 -
Forward Controls Design - Sling Adapter End Plate - ESF-H Black DLC
Forward Controls Design, Inc
MSRP: $66.00$62.70The Forward Controls Design Sling Adapter End Plate — Black DLC (ESF-H Black DLC) is FCD's enhanced QD sling socket end plate for AR-15/M16 carbine lower receivers, finished in Diamond-Like Carbon...MSRP: $66.00$62.70 -
Proof Research - 6.5 Creedmoor 16" Carbon Fiber Barrel - 123515
Proof Research
$1,250.00The Proof Research 6.5 Creedmoor 16" Carbon Fiber Barrel (123515) brings the legendary accuracy and lightweight advantages of Proof Research carbon fiber technology to a compact 6.5 Creedmoor AR-type...$1,250.00 -
Thunder Beast - CB Series .223 CAL Muzzle Brake - 1/2X28 223CB-BRK:1/2X28
Thunder Beast Arms Corp
$125.00The Thunder Beast Arms CB Series .223 Caliber Muzzle Brake with 1/2x28 threads (223CB-BRK:1/2X28) delivers effective muzzle rise and recoil reduction for .223/5.56 NATO AR-15s and bolt-action rifles...$125.00 -
Thunder Beast - CB Series .223 CAL Flash Hider - 1/2X28 223CB-FH:1/2X28
Thunder Beast Arms Corp
$125.00The Thunder Beast Arms CB Series .223 Caliber Flash Hider with 1/2x28 threads (223CB-FH:1/2X28) serves as the flash-suppressing host adapter for Thunder Beast's CB (Collet Brake) quick-detach...$125.00 -
Thunder Beast - CB Series .30 CAL Flash Hider - 5/8X24 30CB-FH:5/8-24
Thunder Beast Arms Corp
$125.00The Thunder Beast Arms CB Series .30 Caliber Flash Hider with 5/8x24 threads (30CB-FH:5/8-24) is the flash-hiding host adapter for Thunder Beast's CB (Collet Brake) quick-detach suppressor system,...$125.00 -
Thunder Beast - CB Series .223 CAL Non-Timed Muzzle Brake - 1/2X28 223CB-NTB:1/2-28
Thunder Beast Arms Corp
$125.00The Thunder Beast Arms CB Series .223 Caliber Non-Timed Muzzle Brake with 1/2x28 threads (223CB-NTB:1/2-28) is the host adapter and muzzle device for Thunder Beast's CB (Collet Brake) quick-detach...$125.00 -
On Sale
Unity Tactical - ModButton Lite 7" - MBL-BLK-SF-7
Unity Tactical
Now: $78.00Was: $86.00The Unity Tactical ModButton Lite 7" (MBL-BLK-SF-7) is a longer-run weapon light activation system for SureFire Scout Series and compatible weapon lights, providing 7 inches of tape switch run for...Now: $78.00Was: $86.00