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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FCD Forward Controls Design Bolt Carrier Group Dimpled SBCG-N-D
Forward Controls Design, Inc
$220.00The Forward Controls Design Bolt Carrier Group — Dimpled (SBCG-N-D) is FCD's Secure-Staking BCG with nitride finish and dimpled texture machined into the bolt carrier body. The SBCG-N-D...$220.00 -
STOPBOX USA- Universal Mag Carrier
STOPBOX USA
$34.00The STOPBOX USA Universal Mag Carrier (stopbox-magcarrier) is a versatile, compatible magazine carrier designed to organize and store handgun or rifle magazines alongside your STOPBOX firearm storage...$34.00 -
Ruger 10/22 Stripped Aluminum Receiver VCSCU-0130
Ruger
$65.00This is a new Ruger factor stripped aluminum receiver compatible with 10/22 pattern firearms. Black Stripped Made in the USA Note: These are stripped receivers so they will not come with any...$65.00 -
LMT Defense LMT Defense - MRP-H Quad Rail 12.75" AR10/AR308 Complete Upper Receiver Bundle BFCLMT-H308P16P
LMT Defense
$2,399.99*Discounts do not apply* The LMT Defense MRP-H Quad Rail 12.75" AR10/.308 Complete Upper Receiver Bundle (BFCLMT-H308P16P) is a complete, ready-to-mount LMT AR-10 piston upper receiver assembly...$2,399.99 -
VLTOR Receiver Extension 6 Position RE-10-A5SR
Vltor Weapon Systems
$56.66The VLTOR Receiver Extension 6-Position (RE-10-A5SR) is a specialized receiver extension providing 6-position adjustability for use with the VLTOR A5 buffer system or standard AR-10/SR-25 pattern...$56.66 -
Out of stock
Remington 870 Super Mag Receiver Assembly 2.75"-3" 12ga w/ Mag Tube
Remington
$100.00This is a Remington 870 Super Mag stripped receiver assembly compatible with 2.75” – 3.5” 12ga components. This receiver was removed from factory new firearms and the serial number shown in the above...$100.00 -
Out of stock
Remington 870 Magnum Receiver Assembly 2.75"-3" 12ga w/Mag Tube
Remington
$75.00This is a Remington 870 Magnum stripped receiver assembly compatible with 2.75” – 3” 12ga components. This receiver was removed from factory new firearms and the serial number shown in the above...$75.00 -
Out of stock
Volquartsen - Mini Mamba LLV for Ruger MK IV 22LR 3" #VC4LLV-0025
Volquartsen
$502.00This is a new Volquartsen Mini Mamba 3” upper receiver compatible with all Ruger Mark IV & Mark IV 22/45 pattern components. This upper will not ship with a bolt assembly. This upper has it all for...$502.00 -
HK Heckler & Koch MR556A1 5.56 30rd Magazine 251770S
Heckler & Koch
$73.99The Heckler & Koch MR556A1 5.56mm 30-Round Magazine (HK PN: 251770S) is the genuine HK factory 30-round 5.56 NATO/.223 Remington magazine for the HK MR556A1 semi-automatic rifle. This steel-body,...$73.99 -
Out of stock
HK Heckler & Koch SP5K 9mm 15rd Magazine #215610S
Heckler & Koch
$83.99New Heckler & Koch SP5/SP5K 9mm 15-round magazine. Designed to match the same quality standards as HK’s legendary MP5 magazines, the SP5K 15‑round mag offers dependable function and reduced reload...$83.99 -
Out of stock
Masterpiece Arms DS9-TCS Hybrid- Medium Red Trigger
Masterpiece Arms
$3,599.00This is a new Masterpiece Arms DS9-TC chambered in 9mm featuring a 4.6" threaded bull barrel with single-port compensator, co-witness Trijicon medium red trigger, aluminum aggressive grip, and...$3,599.00 -
Out of stock
FCD Forward Controls Design 5.56 Bolt Catch Dimpled ABC/R v3 AA
Forward Controls Design, Inc
$58.90The Forward Controls Design ABC/R v3 Dimpled 5.56 Bolt Catch (ABC/R v3 AA) is the dimpled-texture (all-around/AA) variant of FCD's ABC/R v3 Augmented Bolt Catch for AR-15/M16 receivers. The...$58.90