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 - MARS-L Stripped AR15 Lower Receiver - R-M7SL
LMT Defense
MSRP: $380.00$352.35The LMT Defense MARS-L Stripped AR15 Lower Receiver (R-M7SL) is the foundation of the legendary LMT MARS® system. The LMT® Modular Ambidextrous Rifle System (MARS®) lower receiver sets a new standard...MSRP: $380.00$352.35 -
LMT Defense - MRP-L Quad Rail 13.25" AR15 Upper Receiver - L7RA1A
LMT Defense
$940.50The LMT Defense MRP-L Quad Rail (Picatinny) 13.25" AR15 Upper Receiver (L7RA1A) features the patented LMT Monolithic Rail Platform (MRP™) — the upper receiver and handguard are machined from a single...$940.50 -
LMT Defense - MRP-L Quad Rail 9.25" AR15 Upper Receiver - L7S1A
LMT Defense
$890.10The LMT Defense MRP-L Quad Rail (Picatinny) 9.25" AR15 Upper Receiver (L7S1A) features the patented LMT Monolithic Rail Platform (MRP™) — the upper receiver and handguard are machined from a single...$890.10 -
LMT Defense - MRP-L MLOK 13.25" AR15 Upper Receiver - L7Y1A
LMT Defense
$940.50The LMT Defense MRP-L M-LOK 13.25" AR15 Upper Receiver (L7Y1A) features the patented LMT Monolithic Rail Platform (MRP™) — the upper receiver and handguard are machined from a single piece of forged...$940.50 -
LMT Defense - MRP-L MLOK 11.5" Specwar - AR15 Upper Receiver - L7Z1A
LMT Defense
$940.50The LMT Defense MRP-L M-LOK 11.5" AR15 Upper Receiver (L7Z1A) features the patented LMT Monolithic Rail Platform (MRP™) — the upper receiver and handguard are machined from a single piece of forged...$940.50 -
On Sale
Surefire Warcomp 7.62 5/8x24 Flash Hider/Suppressor - WARCOMP-762-5/8-24
Surefire
MSRP: $169.00Now: $152.00Was: $169.00The SureFire WARCOMP 7.62 5/8x24 Flash Hider/Suppressor Adapter (WARCOMP-762-5/8-24) is SureFire's multi-function muzzle device for 7.62mm rifles — simultaneously functioning as a highly effective...MSRP: $169.00Now: $152.00Was: $169.00 -
LMT Defense - 5.56mm 11.5" Chrome Lined MRP Barrel Assembly - L7TA1B
LMT Defense
$554.40The LMT Defense 11.5" Chrome Lined 5.56mm MRP Barrel Assembly (L7TA1B) is engineered specifically for LMT's Monolithic Rail Platform (MRP) upper receivers. This 11.5-inch, 5.56×45 (.223) barrel...$554.40 -
LMT Defense - Tactical Charging Handle Assembly - AR15 - LMP103T
LMT Defense
MSRP: $97.00$90.00The LMT Defense Tactical 5.56 Charging Handle (LMP103T) is an M4 Charging Handle Assembly with an Enhanced Tactical Latch — offering a significant upgrade over mil-spec charging handles. The enlarged...MSRP: $97.00$90.00 -
LMT Defense - Ambidextrous AR15 5.56 Charging Handle - R-LMP103TA
LMT Defense
MSRP: $108.00$100.35The LMT Defense Ambidextrous 5.56 Charging Handle (R-LMP103TA) features enhanced tactical latches on both sides for true ambidextrous operation. Dead-stop latches reduce tension on latch pins,...MSRP: $108.00$100.35 -
Proof Research Carbon Fiber AR 15 Barrel 6mm ARC 18" 128671
Proof Research
$999.00Engineered for shooters who demand precision without the weight penalty, this 18" PROOF Research barrel pairs a 1:7.5 twist rate with a rifle-length gas system for smooth, reliable cycling across a...$999.00 -
LMT Defense Pistol Lower MIDMLK125-MARS-LOWER
LMT Defense
$899.00Pistol Lower from Exclusive 12.5" MARS-L Specwar Pistol MIDMLK125-MARSP The LMT Defense Pistol Lower is the full-featured$899.00 -
Benelli M4 5-Position Telescoping Stock 70132
Benelli
$230.00Upgrade your Benelli M4 tactical shotgun with the genuine OEM 5-Position Telescoping Stock Assembly, trusted by law enforcement and military end-users for its rugged reliability and adjustable fit...$230.00