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 stockOn Sale
LMT Defense - 5.56 Bolt - L7A3B
LMT Defense
Now: $145.80Was: $150.30LMT Complete Bolt features milspec phosphate finish, gas rings installed, and proper black extractor insert with Crane O-ring. Bolt is MPI and HP tested and marked “MP”. When you shoulder your...Now: $145.80Was: $150.30 -
Out of stockOn Sale
LMT Defense - .308 Semi-Auto Bolt Carrier Group - #LM308D
LMT Defense
Now: $558.00Was: $575.10The LMT Defense .308 BCG was designed with the same materials and principles as the 5.56 Enhanced Bolt Carrier Group. This bolt carrier group is exceptionally durable, and it’s no mystery why the...Now: $558.00Was: $575.10 -
Out of stock
LMT Defense - Full-Auto Piston 5.56 Bolt Carrier G2 - #R-L7Q3APE
LMT Defense
MSRP: $282.00$261.45Full auto piston bolt carrier. Developed for the Estonia Defense Forces, the new and improved design features a captive firing pin retainer similar to our .308 rifles. Drop in upgrade for all...MSRP: $282.00$261.45 -
LMT Defense - SOPMOD-Mini 5.56 Buttstock Kit - PDW-KIT
LMT Defense
$560.50The LMT Defense SOPMOD-Mini 5.56 PDW Buttstock Kit (PDW-KIT) is a complete Personal Defense Weapon conversion kit for any mil-spec AR-15. This kit reduces overall weapon length by 2.75 inches...$560.50 -
Out of stock
LMT Defense - SOPMOD Buttstock - L7LA2BA
LMT Defense
MSRP: $228.00$211.50The LMT Defense SOPMOD Buttstock (L7LA2BA) is the preferred stock of USSOCOM (US Special Operations Command) soldiers — trusted by the world's most elite military units. This NSN-issued buttstock...MSRP: $228.00$211.50 -
Out of stockOn Sale
LMT Defense - Full-Auto Ambidextrous Selector - LMP092AA
LMT Defense
Now: $57.87Was: $59.67LMT Defense Full-Auto Ambidextrous Selector. This no frills, tough as nails, ambi safety is a perfect low cost upgrade to your LMT or any other AR-15/AR-10 weapon system. This is a steel, two piece...Now: $57.87Was: $59.67 -
LMT Defense - Semi-Auto Ambidextrous Selector - LMP092CAA
LMT Defense
$59.67The LMT Defense Semi-Auto Ambidextrous Selector (LMP092CAA) provides true ambidextrous safety/selector operation for AR-15 builds. This drop-in ambidextrous safety selector features levers on both...$59.67 -
Out of stockOn Sale
LMT Defense - .308 Lower Parts Kit Light - LM308ALPKL
LMT Defense
Now: $145.80Was: $333.00By popular demand, we’ve established a lower parts kit less the trigger group. While our two-stage trigger group is among the best on the market, we realize you may prefer drop-in trigger groups or...Now: $145.80Was: $333.00 -
Out of stockOn Sale
LMT Defense - Forward Assist - LMP1115
LMT Defense
Now: $33.39Was: $34.47LMT Defense Forward Assist. Fits all LMT rifles.Now: $33.39Was: $34.47 -
LMT Defense - MRP Rifle Length Gas Tube - LM308B2E
LMT Defense
$34.47The LMT Defense MRP Rifle Length Gas Tube (LM308B2E) is a genuine LMT replacement gas tube for MWS (.308/7.62 NATO) MRP barrel assemblies. LMT MRP barrels require low-profile gas blocks with straight...$34.47 -
Out of stockOn Sale
LMT Defense - MRP Mid Length Gas Tube - L7S1B3
LMT Defense
Now: $33.39Was: $34.47LMT Defense MRP® gas tube for 5.56 16″ barrels and .308 16″ or less barrel. SPECSNow: $33.39Was: $34.47 -
Out of stockOn Sale
LMT Defense - MRP Carbine Length Gas Tube - L7MA1B3
LMT Defense
Now: $33.39Was: $34.47LMT Defense MRP® gas tube for 5.56 barrels 14.5″ and shorter.Now: $33.39Was: $34.47