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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On Sale
Magpul - PMAG D-50 9mm 50rd. Drum Magazine HK94/MP5 - MAG1181-BLK
Magpul Industries
MSRP: $124.95Now: $118.70Was: $124.95The Magpul PMAG D-50 9mm 50-Round Drum Magazine for HK94/MP5 (MAG1181-BLK) is Magpul's 50-round polymer drum magazine designed specifically for HK94, MP5, and MP5-compatible firearms using the...MSRP: $124.95Now: $118.70Was: $124.95 -
Out of stock
LMT Defense - EURO AXLE Two Stage Semi-Auto Trigger Group - LMP2400EUS
LMT Defense
MSRP: $250.00$231.75Lewis Machine & Tool EURO model Two Stage AXLE semi-automatic Trigger Group for AR-10 and AR-15 pattern firearms. The EURO AXLE trigger features an approximate 4.5lb pull the provides a clean and...MSRP: $250.00$231.75 -
LMT Defense - Semi-Auto Axle Trigger Group - LMP2400ES
LMT Defense
MSRP: $250.00$231.75The LMT Defense Semi-Auto AXLE Trigger Group (LMP2400ES) is one of the finest combat triggers in the firearms industry. The AXLE is a patented two-stage trigger system that blends the best features...MSRP: $250.00$231.75 -
LMT Defense - Carbine Length AR15 Polymer Handguard Set - LMP154G
LMT Defense
$66.30The LMT Defense Carbine Length AR15 Polymer Handguard Set (LMP154G) is a mil-spec drop-in polymer handguard set for standard AR-15 carbine builds. Designed as a lightweight, durable, and...$66.30 -
On Sale
Magpul PMAG M3 30rd .223/5.56mm AR15 Magazine
Magpul Industries
MSRP: $14.95Now: $14.20Was: $14.95The Magpul PMAG 30 AR/M4 GEN M3 .223/5.56 Magazine — Black (MAG557-BLK) is Magpul's industry-standard 30-round GEN M3 PMAG for AR-15/M4 rifles in black. The GEN M3 PMAG is the gold standard for AR-15...MSRP: $14.95Now: $14.20Was: $14.95 -
On Sale
Magpul PMAG M3 30rd. .223/5.56mm AR15 Magazine - Coyote Tan
Magpul Industries
MSRP: $14.95Now: $14.20Was: $14.95The Magpul PMAG 30 AR/M4 GEN M3 .223/5.56 Magazine — Coyote Tan (MAG557-MCT) is Magpul's industry-standard 30-round GEN M3 PMAG for AR-15/M4 rifles, finished in Coyote Tan (MCT) for use with...MSRP: $14.95Now: $14.20Was: $14.95 -
On Sale
Magpul PMAG M3 40rd. .223/5.56mm AR15 Magazine MAG233-BLK
Magpul Industries
Now: $21.80Was: $22.95The Magpul PMAG 40 AR/M4 GEN M3 .223/5.56 Magazine (MAG233-BLK) is Magpul's high-capacity 40-round PMAG for AR-15/M4 pattern rifles chambered in 5.56 NATO or .223 Remington. The PMAG 40 M3 features...Now: $21.80Was: $22.95 -
Trijicon RMRcc 3.25 MOA Micro Red Dot Sight
Trijicon
$699.00Split seconds matter. The new Trijicon RMRcc has a thinner, lower-profile design that reduces the risk of snags for a faster and easier draw. Although smaller, the RMRcc keeps all the great features...$699.00 -
LMT Defense - 7.62x51mm 16" LW Chrome Lined MWS Barrel Assembly - R-LM308B116
LMT Defense
MSRP: $784.00$727.20The LMT Defense 7.62×51mm 16" LW Chrome Lined MWS Barrel Assembly (R-LM308B116) is the lightweight version of LMT's standard 16" .308 MWS barrel, engineered to reduce overall rifle weight without...MSRP: $784.00$727.20 -
Out of stock
LMT Defense - 5.56 Gen 2 Enhanced Piston Full-Auto Bolt Carrier Group - L7D3CPE
LMT Defense
MSRP: $468.00$425.70The LMT Defense 5.56 Gen 2 Enhanced Piston Full-Auto Bolt Carrier Group (L7D3CPE) is LMT's premium piston BCG designed for the MRP-L platform's short-stroke piston barrels. The Gen 2 enhanced design...MSRP: $468.00$425.70 -
Out of stock
LMT Defense - Standard 5.56 Full-Auto Bolt Carrier Group - #R-L7D3
LMT Defense
$304.20Full Auto Bolt Carrier Group, 5.56×45 (.223) The L7D3 is the perfect BCG for a Mil-Spec build or upgrade from sub-par equipment. LMT Defense has made the full-auto M16/M4 BCG and its components for...$304.20 -
Out of stock
LMT Defense - Defender-H Stripped .308 Lower Receiver - #LM308A1
LMT Defense
MSRP: $380.00$352.35The Defender-H lower receiver, also known as the original LMT .308 Modular Weapon System (MWS) lower receiver, is an intermediate-caliber receiver designed specifically for use with LMT’s MWS upper...MSRP: $380.00$352.35