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
Q LLC - Cherry Bomb Muzzle Brake - CB-1/2-28
Q LLC
Now: $90.00Was: $100.00Q Cherry Bomb muzzle brake chambered for 7.62mm rifles that is compatible with the THUNDER CHICKEN and trash PANDA silencers by Q. It features a taper mount shoulder to align with Q barrels and...Now: $90.00Was: $100.00 -
Out of stockOn Sale
Q LLC - Bottle Rocket Enhanced Muzzle Brake - BR-QUICKIE
Q LLC
Now: $89.00Was: $99.00The Q Bottle Rocket is an enhanced brake for use with our Cherry Bomb muzzle brake. On top of that, it also serves as a sexy-ass thread protector for your Cherry Bomb when not hosting a silencer.As...Now: $89.00Was: $99.00 -
Out of stockOn Sale
LMT Defense - M203 Rail Mounted Leaf Sight
LMT Defense
Now: $243.90Was: $251.55LMT Defense M203 rail mounted leaf sight. This sight is used for the M203 40mm grenade launcher and is used to be mounted to either the grenade launcher itself or mounted to the firearm the granade...Now: $243.90Was: $251.55 -
Out of stockOn Sale
LMT Defense - Semi Safety Selector - LMP092
LMT Defense
Now: $38.25Was: $42.50Lewis Machine & Tool semi safety selector switch. The Lewis Machine and Tool AR-15 Safety Selector is built to Mil-Spec for compatibility with all lower receivers. Machined from steel and black...Now: $38.25Was: $42.50 -
On Sale
Magpul - PMAG D-50 9mm 50rd - MAG1137-BLK
Magpul Industries
Now: $118.70Was: $124.95The Magpul PMAG D-50 GL9 9mm 50-Round Drum Magazine for Glock-Compatible Firearms (MAG1137-BLK) is Magpul's 50-round polymer drum magazine designed for Glock-compatible 9mm pistols, carbines, and PCC...Now: $118.70Was: $124.95 -
Out of stockOn Sale
Knights Armament - SR-25 Upper Receiver - 20" - 111472
Knights Armament Company
Now: $4,114.69Was: $4,331.25Knights Armament SR-25 upper receiver kit, chambered for 7.62x51mm. Featuring Knight’s 20” cut rifled, precision barrel and their newly designed 3-prong QDC flash hider, the 20” Precision Rifle upper...Now: $4,114.69Was: $4,331.25 -
Out of stockOn Sale
Knights Armament - SR-15 Complete Upper Mod 2 5.56 NATO - 16" - 31962
Knights Armament Company
Now: $2,014.55Was: $2,120.58The Knights Armament SR-15 E3 Mod 2 series' 5.56 mm NATO barrel is manufactured for military grade durability, and is free-floated inside a URX4 M-LOK handguard. An improved E3 round-lug bolt design...Now: $2,014.55Was: $2,120.58 -
Out of stockOn Sale
Knights Armament - SR-15 CQB Upper Receiver - 11.5" - #31963
Knights Armament Company
Now: $2,088.62Was: $2,198.54The Knights Armament SR-15 E3 Mod 2 series' 5.56 mm NATO barrel is manufactured for military grade durability, and is free-floated inside a URX4 M-LOK handguard. An improved E3 round-lug bolt design...Now: $2,088.62Was: $2,198.54 -
Out of stockOn Sale
Magpul - M3 7.62x39 30 Round Magazine - MAG573-BLK
Magpul Industries
Now: $28.45Was: $29.95The PMAG 30 AK/AKM GEN M3 is a durable, lightweight, high reliability 30-round polymer magazine designed for Kalashnikov pattern rifles in 7.62x39mm (AK-47, AKM, AKS, SIG556R, and others.) It...Now: $28.45Was: $29.95 -
Out of stockOn Sale
Magpul - PMAG 9mm 17 rounds fits Glock 17 - MAG290-BLK
Magpul Industries
Now: $21.80Was: $22.95The 7.62x51 NATO (.308 Winchester) PMAG 10 LR/SR GEN M3 is a lightweight, cost effective, high reliability magazine for SR25/M110 pattern rifles in the smallest possible magazine size. Ideal for...Now: $21.80Was: $22.95 -
Out of stockOn Sale
Magpul - PMAG 300 Blackout 20 Round AR Mag - MAG1182-BLK
Magpul Industries
Now: $15.15Was: $15.99Magpul's PMAG 20 AR 300 B GEN M3 is a purpose-built magazine for rifles chambered in .300 Blackout (300 BLK). Similar in every way to our PMAG 30 AR 300 B, the PMAG 20 is more compact for increased...Now: $15.15Was: $15.99 -
Out of stockOn Sale
Surefire - X300 Ultra Weapon Light - X300U-A
Surefire
Now: $343.00Was: $379.00This enhanced version of Surefire's best-selling X300 Ultra now delivers a stunning 1,000 lumens of LED-generated output focused by a precision TIR lens, creating a far-reaching high intensity beam -...Now: $343.00Was: $379.00