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 - 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: $341.00Was: $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: $341.00Was: $379.00 -
Out of stock
Streamlight TLR-7X - 69424
Streamlight
$253.66The TLR-7 series is going rechargeable! The TLR-7 X multi-fuel rail-mounted light accepts either Streamlight's SL-B9 USB rechargeable protected lithium-ion battery pack or a CR123A lithium battery...$253.66 -
Out of stock
Streamlight - TLR-1 HL Rail Mounted Tactical Light - 69260
Streamlight
$292.96The Streamlight TLR-1 HL now provides an 1000 lumen blast of light for maximum illumination while clearing a room or searching an alley. Its wide beam pattern lights up large areas so you can...$292.96 -
Out of stockOn Sale
Sons of Liberty Gun Works - Blaster Starter Kit - #BSK
Sons of Liberty Gunworks
Now: $54.15Was: $57.00The Sons of Liberty Gun Works AR-15 lower parts kit comes with almost everything you need to finish building your lower receiver. Also known as the blaster starter kit, the only components missing...Now: $54.15Was: $57.00