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
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 -
Out of stockOn Sale
LMT Defense - MRP Pistol Length Gas Tube - L7S1B3BRA
LMT Defense
Now: $33.39Was: $34.47LMT Defense MRP® gas tube for 300 Blackout Barrels SPECSNow: $33.39Was: $34.47 -
Out of stockOn Sale
LMT Defense - 2 Position Piston Plug - R-L7S1B6CF
LMT Defense
Now: $48.06Was: $49.59Drop in replacement part for LMT Gen 2 Piston barrels. Perfect upgrade for existing Estonia Reference Rifles that use 1 position plugs. Note: This part is not compatible with with original LMT piston...Now: $48.06Was: $49.59 -
Out of stockOn Sale
LMT Defense - Estonia 5.56 QD Muzzle Device - L8FH3P556E
LMT Defense
Now: $67.68Was: $69.75Flash hider designed for the Estonian Military not only looks sleek and aggressive; it drastically reduces muzzle flash, and allows for quick connector sound suppressors.Suppressor ready flash hider...Now: $67.68Was: $69.75 -
LMT Defense - Shorty 40 Receiver - L2X1
LMT Defense
MSRP: $1,743.00$1,616.40LMT Defense 40mm M203 “Shorty 40″ variant. Designed to be mounted to any standard 1913 Picatinny rails. Does not include barrel or sight. Includes three recoil lugs and three locking lugs to hold...MSRP: $1,743.00$1,616.40 -
Out of stock
LMT Defense - L129A1 Reference Rifle 7.62x51 Rifle - 16" - LM308SSR
LMT Defense
$4,476.00LMT® reference to the weapon contracted by United Kingdom Ministry of Defence designated the L129A1. This reference weapon brings you as close as you can get to the true rifle system provided to the...$4,476.00 -
Out of stock
Glock - OEM Threaded Barrel for Glock 19 Gen 5/19x/45 - 47698
Glock
$310.00High quality components and precise manufacturing make GLOCK parts ideal for maintaining and upgrading firearms. The durability, reliability and excellent build quality of these parts will ensure...$310.00 -
Out of stock
Beta Company D-Mag 100rd Twin-Drum Magazine 5.56 NATO AR-15/M4
$264.00Beta Company C-Mag twin-drum 100-round magazine for 5.56x45mm AR-15 & M4 pattern platforms. BetaCo's 100 round drums are the ultimate high-capacity magazines. These magazines are made from tough...$264.00 -
Out of stock
Beta Company D-Mag 100rd Twin-Drum Magazine 9mm MP5 Pattern Firearms
$318.00Beta Company C-Mag twin-drum 100-round magazine for 9mm MP5 pattern firearms. BetaCo's 100 round drums are the ultimate high-capacity magazines. These magazines are made from tough polymer with steel...$318.00 -
Out of stock
Heckler & Koch - MR556 Complete Upper Receiver Kit - 81000584
Heckler & Koch
$2,069.00The MR556A1 Upper Receiver Kit includes a complete upper receiver/barrel assembly, bolt carrier assembly, buffer, and buffer spring allowing most high-quality 5.56 mm AR-style rifles to be...$2,069.00