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 - 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 -
Out of stock
Trijicon - ACOG 4x32 Rifle Scope - TA31F-G
Trijicon
$1,617.00The Trijicon ACOG (Advanced Combat Optical Gunsight) is a fixed power, compact riflescope with an illuminated reticle pattern for use in bright to low/no light. The ACOG is designed to be extremely...$1,617.00 -
Out of stockOn Sale
Magpul - Angled Foregrip 2 - MAG414-BLK
Now: $33.20Was: $34.95The AFG-2 is a slim line design that is shorter in overall length and width compared to the original AFG. Smaller size allows for mounting on a wider variety of railed hand guards and better...Now: $33.20Was: $34.95 -
Out of stockOn Sale
Magpul - PMAG M3 7.62 20rd. AR10/SR25 Magazine - MAG291-BLK
Magpul Industries
Now: $21.80Was: $22.95Magpul's 7.62x51 NATO (.308 Winchester) PMAG 20 LR/SR GEN M3 is a lightweight, cost effective, highly reliable magazine for SR25/M110 pattern rifles. It features true 20-round capacity, a...Now: $21.80Was: $22.95