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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Forward Controls Design - 90° Non-Offset Levers - ASF-90
Forward Controls Design, Inc
$90.25The Forward Controls Design 90° Non-Offset Ambidextrous Safety Selector (ASF-90) is FCD's 90-degree full-throw semi-auto safety selector with non-offset (standard) levers for AR-15/M16 pattern rifles...$90.25 -
Out of stock
LMT Defense - Flat Top Upper Receiver - Defender-L 5.56 Lower Receiver Stripped - #L7D1A-LMP149H-COMBO
LMT Defense
$423.00Get your LMT L7D1A upper receiver and LMT LMP149H lower receiver combo for your AR15 build ordered today! UPPER RECEIVER The LMT Defense standard flat-top AR15 upper receiver features mil-spec...$423.00 -
Forward Controls Design - 3 Prong Flash Suppressor - FCD-3P15
Forward Controls Design, Inc
MSRP: $90.00$85.50The Forward Controls Design 3-Prong Flash Suppressor / Plan B Mount (FCD-3P15) is a multi-functional muzzle device designed in collaboration with Revival Defense — functioning as both a standalone...MSRP: $90.00$85.50 -
Forward Controls Design - MLOK Fixed Loop, Heavy - MFH
Forward Controls Design, Inc
MSRP: $50.00$47.50The Forward Controls Design M-LOK Fixed Loop Heavy Sling Adapter (MFH) is FCD's heavy-duty fixed loop sling attachment point for M-LOK compatible handguards. The MFH (MLOK Fixed loop, Heavy, Forward...MSRP: $50.00$47.50 -
Out of stockOn Sale
Forward Controls Design - Enhanced Mag Release Button - Ambidextrous - Dimpled Lever - #EMR-A, AA
Forward Controls Design, Inc
MSRP: $70.00Now: $59.50Was: $70.00EMR-A, AA was designed for TDP spec forged lower receivers, if your lower is billet with thick walls, or differ a great deal from TDP specs, please contact us regarding compatibility. EMR-A, AA is...MSRP: $70.00Now: $59.50Was: $70.00 -
Forward Controls Design - Sling Adapter End Plate - ESF-H FDE
Forward Controls Design, Inc
$62.70The Forward Controls Design Sling Adapter End Plate — FDE (ESF-H FDE) is FCD's enhanced QD sling socket end plate for AR-15/M16 carbine lower receivers, finished in FDE (Flat Dark Earth) for use with...$62.70 -
Out of stockOn Sale
Q LLC - Fix12” Barrel Assembly - 8.6 BLK - #ACC-FIX-BARREL-8.6-12IN
Q LLC
MSRP: $515.00Now: $459.00Was: $515.00The Q The Fix 8.6 Blackout barrel assembly is designed for the Q The Fix and includes a headspaced barrel extension. Compatible with Q The Fix Rifle. UPC: 850035705179 Manufacturer: Q Manufacturer...MSRP: $515.00Now: $459.00Was: $515.00 -
Forward Controls Design - 0.750 Gas Journal Gas Block - GBF
Forward Controls Design, Inc
MSRP: $65.00$61.75The Forward Controls Design 0.750" Gas Journal Low-Profile Gas Block (GBF) is FCD's precision-machined low-profile gas block for AR-15/M16 barrels with a standard 0.750" gas journal diameter. The GBF...MSRP: $65.00$61.75 -
Forward Controls Design - VLTOR A5 Compatible Receiver Extension - RE5F
Forward Controls Design, Inc
MSRP: $60.00$57.50The Forward Controls Design AR Enhanced Magazine Release Button (EMR-H) is FCD's heavy-profile enhanced magazine release button for AR-15/M16-pattern lower receivers. The EMR-H (Enhanced Magazine...MSRP: $60.00$57.50 -
Forward Controls Design - Sling Adapter End Plate - ESF-H1
Forward Controls Design, Inc
$48.45The Forward Controls Design Sling Adapter End Plate (ESF-H1) is FCD's low-profile enhanced sling attachment end plate for AR-15/M16 carbine lower receivers. The ESF (End plate, Sling, Forward...$48.45 -
Forward Controls Design - Reinforced Buffer Retainer - For AR Systems - RBF
Forward Controls Design, Inc
MSRP: $8.00$7.60The Forward Controls Design Reinforced Buffer Retainer (RBF) is FCD's upgraded replacement for the factory AR-15 buffer retainer. The standard mil-spec buffer retainer is a known weak point in the...MSRP: $8.00$7.60 -
Forward Controls Design - Sotar Cam Pin - Fits AR15/M16 Systems- SCP-NP3
Forward Controls Design, Inc
MSRP: $17.00$16.15The Forward Controls Design Sotar Cam Pin — NP3 Finish (SCP-NP3) is FCD's premium replacement bolt carrier group cam pin for AR-15/M16 platforms, finished in Robar's NP3 electroless nickel-PTFE...MSRP: $17.00$16.15