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
Ruger - BX-25 .22 LR 25rd Magazine - 90398
Ruger
$63.95Ruger's factory magazines features high quality components and precise manufacturing that will ensure long-lasting performance and reliability. This is 2-25rd magazines coupled together. Polymer...$63.95 -
Out of stockOn Sale
LMT Defense - 7.62x51mm 20" Chrome Lined MWS Barrel Assembly - LM308B220
LMT Defense
Now: $627.30Was: $646.20The 20-inch lightweight profile .308/7.62x51mm chambered MWS barrel features a chrome lined bore with a 1:10 right hand twist. Designed for the LMT Defense MWS receiver, this barrel utilizes a...Now: $627.30Was: $646.20 -
Out of stock
LMT Defense - 5.56 Full Auto Bolt Carrier Group With Enhanced Bolt - L7FB3
LMT Defense
MSRP: $630.00$489.60This bolt carrier group features the LMT Defense standard bolt carrier, cam pin, and firing pin, with the addition of the enhanced bolt. Bolt features: Built from a proprietary material that is not...MSRP: $630.00$489.60 -
Out of stock
LMT Defense - 5.56 Enhanced Full-Auto Bolt Carrier Group - #R-L7Q3
LMT Defense
$553.50If LMT's standard bolt carrier group is the infantryman of the gun industry, then their enhanced BCG is the delta operator. This carrier group was designed to function effectively in full-auto,...$553.50 -
Out of stockOn Sale
LMT Defense - 5.56 Semi-Auto Bolt Carrier Group - L7A3
LMT Defense
Now: $242.10Was: $249.75The LMT 5.56 direct impingement bolt carrier group will fit in any mil-spec ar15 upper receiver and is made of high-quality materials with durability in mind. This bolt carrier features...Now: $242.10Was: $249.75 -
LMT Defense - 7.62x51mm 16" Chrome Lined MWS Barrel Assembly - LM308B216
LMT Defense
MSRP: $697.00$646.20The LMT Defense 7.62×51mm 16" Chrome Lined MWS Barrel Assembly (LM308B216) is LMT's standard 16-inch .308 Winchester barrel for the MWS (Modular Weapon System) heavy platform. Featuring chrome-lined...MSRP: $697.00$646.20 -
Out of stock
LMT Defense - 7.62x51mm 13.5" LW Chrome Lined MWS Barrel Assembly - LM308B113
LMT Defense
$727.20The 13.5-inch lightweight profile .308/7.62x51mm chambered MWS barrel features a chrome lined bore with a 1:10 right hand twist. Designed for the LMT MWS receiver, this barrel utilizes a low-profile...$727.20 -
LMT Defense - MARS-H Stripped AR10 Lower Receiver LM308AMSL Code "LMT20" at Checkout for 20% Off
LMT Defense
MSRP: $588.00$545.40Use Code "LMT20" at Checkout to Save 20% The LMT Modular Ambidextrous Rifle System (MARS) lower receiver offers ambidextrous controls to include the selector, magazine release and bolt catch and...MSRP: $588.00$545.40 -
Out of stockOn Sale
LMT Defense - Defender-L Stripped Lower Receiver - #LMP149H
LMT Defense
MSRP: $195.00Now: $175.50Was: $180.90This stripped AR-15 lower is forged from highly durable 7075 aluminum and has a hardcoat anodized finish. It is fully compatible with Mil-Spec lower parts and made to the exacting tolerances LMT is...MSRP: $195.00Now: $175.50Was: $180.90 -
Out of stock
LMT Defense - 5.56mm M4/M16 20" AR15 Barrel Assembly - LMP10409
LMT Defense
$440.1020″ CHROME LINED 1:7″ TWIST M16/M4-STYLE 5.56 BARREL W/ A-FRAME FRONT SIGHT HOUSING. DOES NOT INCLUDE UPPER RECEIVER, FRONT SIGHT POST, SWIVEL, OR SLIP RING...$440.10 -
Out of stockOn Sale
LMT Defense - 5.56mm M4/M16 16" AR15 Barrel Assembly - LMP10405
LMT Defense
Now: $401.40Was: $424.80This is a Lewis Machine & Tool M4/M16 style 16-inch .223/5.56mm barrel assembly. It features 1/2x28 muzzle threads, a pinned flat-top height front sight gas block, carbine-length gas system,...Now: $401.40Was: $424.80 -
Out of stockOn Sale
LMT Defense - 5.56mm M4/M16 14.5" AR15 Barrel Assembly - LMP10406
LMT Defense
Now: $401.40Was: $428.40This is a Lewis Machine & Tool M4/M16 style 14.5-inch .223/5.56mm barrel assembly. It features 1/2x28 muzzle threads, a pinned flat-top height front sight gas block, carbine-length gas system,...Now: $401.40Was: $428.40