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 stockOn Sale
LMT Defense - 5.56 NATO 20" Stainless Steel Barrel Assembly - #L7SD1B
LMT Defense
MSRP: $893.00Now: $803.70Was: $828.00Specs: Caliber: 5.56 NATO Barrel Length: 20" Barrel Material: Stainless Steel (SS) Rifling Twist Rate: 1:7"MSRP: $893.00Now: $803.70Was: $828.00 -
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 high resolution. The 17" x 11" mat provides a...$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 diagram and parts breakdown printed in high...$39.99 -
Out of stock
Heckler & Koch - Soft Pistol Case - 10" x 7.5" - Black - HK51001075
Heckler & Koch
$39.99The Heckler & Koch Soft Pistol Case — 10" x 7.5" — Black (HK PN: HK51001075) is HK's official soft-sided pistol storage and transport case for full-size and compact HK handguns in black. Provides padded interior protection for HK pistols (USP, P30,...$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 padded interior protection for HK pistols (USP, P30,...$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 Turret Cap, Forward Controls) replaces the factory...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 section. The RSF-H (Rail Sling, Fixed loop, Heavy, Forward...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 (DLC) coating for maximum hardness, corrosion resistance,...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 configuration. The 16-inch length is ideal for an...$1,250.00 -
Out of stock
Thunder Beast - BA Series .338 Muzzle Brake - 5/8x24 #338BA-BRK:5/8-24
Thunder Beast Arms Corp
$145.00Thunder Beast Arms Corp BA Muzzle Brake .338 CAL 5/8x24$145.00 -
Out of stock
Thunder Beast - BA Series .338 Muzzle Brake - 3/4x24 #338BA-BRK:3/4-24
Thunder Beast Arms Corp
$145.00Thunder Beast Arms Corp BA Muzzle Brake .338 CAL 3/4x24$145.00 -
Out of stock
Thunder Beast - SR Muzzle Brake - 3/4x24 #SR-BRK:3/4-24
Thunder Beast Arms Corp
$145.00Thunder Beast Arms Corp SR Muzzle Brake 3/4x24$145.00