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
B5 Systems SOPMOD Stock Assembly AR Milspec - Black #SOP-1074
B5 Systems
Now: $95.00Was: $100.00This is a new B5 Systems SOPMOD stock assembly compatible with AR pattern buffer tubes. The SOPMOD features color-matched steel hardware, no slip-cushioned buttpad, and dual water-resistant storage...Now: $95.00Was: $100.00 -
Out of stock
HALEY STRATEGIC PARTNERS THORNTAIL X OFFSET LIGHT MOUNT #LM_TX_MLOK_STD-1-1-BLK
Haley Strategic Partners
$55.00The Thorntail X M-LOK Offset Light Mount provides optimal weapon light positioning in a minimalist footprint. The M-LOK Offset Light Mount enables light placement in four positions around the rail...$55.00 -
Haley Strategic Partners - Thorntail X Inline Light Mount -LM_TX_MLOK_INL-1-1-BLK
$45.00The Haley Strategic Partners Thorntail X Inline Light Mount for M-LOK (LM_TX_MLOK_INL-1-1-BLK) is a precision-machined weapon light mounting solution designed to mount a SureFire Scout-style weapon...$45.00 -
Out of stock
Stern Defense - MAG-AD9 9mm Luger Glock 9mm/.40 S&W Mag Well Adaptor - #MAGAD9
Stern Defense
$189.00This is a new Stern Defense MAG-AD9 magazine well adaptor compatible with AR pattern firearms chambered in 9mm Luger. Convert your standard mil spec AR 15, M4, M16 lower assembly to use 9mm and .40...$189.00 -
Out of stockOn Sale
Stern Defense - MOD4 9MM LUGER 4” Complete Upper Receiver Glock - Black #SD4INMOD4MLOK4INBBL9MM
Stern Defense
Now: $436.21Was: $475.00This is a new Stern Defense MOD4 complete Glock compatible complete upper receiver chambered in 9mm Luger. It features a 4-inch barrel, MBC blast can, free float M-LOK handguard, full length...Now: $436.21Was: $475.00 -
Out of stock
Stern Defense - RAB-AD Pic Rail Rapid Attach Buttstock Adapter - Black - #SDRABADPICRAIL
Stern Defense
$150.00The Rapid Attach Buttstock Adapter for Pic Rail allows you to greatly reduce the length of your firearm for compact storage and easy transportation without any modifications. It allows for the...$150.00 -
Out of stock
Stern Defense RAB-AD Rapid Attach Buttstock Adapter for ARs Black #STNRABADD1M
Stern Defense
$150.00This is a new Stern Defense RAB-AD (Rapid Attach Buttstock Adapter) compatible with AR pattern firearms. The Rapid Attach Buttstock Adapter allows you to greatly reduce the length of your firearm for...$150.00 -
Radian Weapons - AR15 Extended Bolt Catch R0323
Radian Weapons
$29.95The Radian EBC is an enhanced bolt catch to increase the user's access to the bolt lock and release function. Features enlarged paddles and non-slip grooves for ease of manipulation.$29.95 -
Radian Weapons Afterburner + Ramjet Glock 19 GEN 3 - 5 Compensator/Barrel Combo - Match Grade Barrel, Intra-Lok Mount G19G3-IL-RN
Radian Weapons
$389.95AFTERBURNER + RAMJET together reduce recoil up to 44% when using 115g ammunition. At only .47" long, the AFTERBURNER offers unprecedented performance in a micro compensator and is more effective than...$389.95 -
Radian Weapons - Guardian Trijicon RMR Optic Guard Mount - Fits MOS Glocks - G1501
Radian Weapons
$209.95The Radian GUARDIAN Optic Mounting System provides unprecedented protection for your pistol red dot optic. Machined from 7075 aluminum & hard anodized, the design provides top/ front/side impact...$209.95 -
Out of stock
Radian Weapons - Guardian Optic Guard Glock MOS TJ RMR - #G1001
Radian Weapons
$129.95The Radian GUARDIAN Optic Mounting System provides unprecedented protection for your pistol red dot optic. Machined from 7075 aluminum & hard anodized, the design provides top/ front/side impact...$129.95 -
Forward Controls Design - 5.56 Ambidextrous Charging Handle - BLACK - ACF-556
Forward Controls Design, Inc
MSRP: $120.00$114.00The Forward Controls Design 5.56 Ambidextrous Charging Handle — Black (ACF-556) is FCD's duty-grade ambidextrous charging handle for 5.56 AR-15/M16-pattern rifles. The ACF (Ambidextrous Charging...MSRP: $120.00$114.00