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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Out of stock
$46.71 -
Out of stock
Knights Armament - KAC Aimpoint Micro Battery Cap Assembly - #25871
Knights Armament Company
$46.71Â Â$46.71 -
Knights Armament - Barrel Extension Action Wrench - 30447
Knights Armament Company
MSRP: $101.35$96.28The Knight's Armament Barrel Extension Action Wrench (KAC PN: 30447) is KAC's purpose-designed action wrench for removing and installing barrel extensions on SR-15, SR-25, and other KAC platforms...MSRP: $101.35$96.28 -
LMT Defense - Rail Mounted M203 Receiver + M203 9" Barrel Bundle - L2B1-LMP380
LMT Defense
$2,341.00The LMT Defense Rail Mounted M203 Receiver + 9" M203 Barrel Bundle (L2B1-LMP380) combines two of LMT's most sought-after 40mm grenade launcher components into one package: the Rail Mounted M203...$2,341.00 -
Out of stockOn Sale
LMT Defense - 243Win 20" Barrel Assembly - #LM243B220S
LMT Defense
Now: $765.10Was: $810.00LMT® 20″ stainless steel 1:10″ RH twist 243 Winchester barrel for MWS upper receivers. Includes low profile gas block, straight gas tube, A2 flash hider. SPECS Barrel Caliber: 243 Win Barrel Length:...Now: $765.10Was: $810.00 -
Out of stock
Ruger - Standard Ruger MK IV Upper 6" Barreled Receiver .22 LR - #VCSCU‑0008
Ruger
$30.00This is a factory new never fired Ruger MK IV stripped barreled receiver chambered for .22 LR. This upper comes with adjustable sights and a 6" stubby pencil profile barrel. The push-button takedown...$30.00 -
LMT Defense - Full-Auto .308 Bolt Carrier Group - LM308DA
LMT Defense
MSRP: $620.00$575.10The LMT Defense Full-Auto .308 Bolt Carrier Group (LM308DA) is a mil-spec 7.62×51 NATO bolt carrier group engineered for LMT's MWS (Modular Weapon System) platform. Full-auto rated for maximum...MSRP: $620.00$575.10 -
Out of stockOn Sale
LMT Defense - Buffer Tube Kit - .308 - #LM308BTK
LMT Defense
MSRP: $152.00Now: $136.80Was: $144.00The LM308BTK LMT Defense MWS Buffer Tube kit is perfect for those building a weapon on a budget or over time. Get what you need with out parts you dont. This kit is operation ready with our MWS, dry...MSRP: $152.00Now: $136.80Was: $144.00 -
LMT Defense - 20" Stainless Steel MWS 6.5 Creedmoor Barrel Assembly - LM650B220S
LMT Defense
MSRP: $947.00$877.95The LMT Defense 20" Stainless Steel 6.5 Creedmoor MWS Barrel Assembly (LM650B220S) is engineered for extreme long-range precision. This 20-inch stainless steel barrel features a 1:8" right-hand twist...MSRP: $947.00$877.95 -
Out of stock
VLTOR - IMOD Improved Modular Stock MIL-SPEC - #AIB-MST
Vltor Weapon Systems
$98.95The IMod MIL-SPEC stock is a vast improvement over the OEM buttstock included on most factory rifles. With interchangeable cheekpieces, rubber buttpad, and optional battery storage tubes, the IMod is...$98.95 -
Out of stock
VLTOR - IMOD Improved Modular Stock MIL-SPEC - AIB-MSB
Vltor Weapon Systems
MSRP: $98.95$89.06The VLTOR IMOD (Improved Modular) Stock in Mil-Spec (AIB-MSB) is VLTOR's flagship AR-15 collapsible stock, featuring an integrated, modular design with a built-in rear sling loop, cheekweld...MSRP: $98.95$89.06 -
Out of stock
VLTOR - Modular Upper Receiver - MUR-1A
Vltor Weapon Systems
MSRP: $269.95$242.96The VLTOR MUR-1A Modular Upper Receiver is a premium mil-spec upper receiver for AR-15 builds, machined from 7075 T6 aluminum with a Type III hard anodize finish for outstanding strength and...MSRP: $269.95$242.96