Gun Parts
Welcome to the Gun Parts superstore at Boss Firearms Company, LLC. Whether you are undertaking a custom precision build, performing routine armorer maintenance, or upgrading an existing platform, we stock the high-performance components you need. As an authorized dealer for premium OEM and aftermarket manufacturers, we provide everything from stripped receivers and match-grade triggers to enhanced bolt carrier groups (BCGs) and duty-ready barrels for rifles, handguns, and shotguns.
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LMT Defense - 350 Legend 16" Stainless Steel Barrel Assembly - L7KA1S
LMT Defense
$627.00The LMT Defense 16" Stainless Steel 350 Legend MRP-L Barrel Assembly (L7KA1S) brings LMT's renowned Monolithic Rail Platform modularity to the .350 Legend cartridge — America's most popular...$627.00 -
Out of stock
LMT Defense - QD Endplate - #L7A2DERRR
LMT Defense
MSRP: $42.10$39.06LMT® manufactured receiver endplate with QD swivel insertion point. Featuring a low profile, slim design, the L7A2DERRR is a great upgrade on your current rifle or a great addition to your next build...MSRP: $42.10$39.06 -
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 -
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...$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 -
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...$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