Any Category Parts Upper Parts Bolt Carrier Groups
Any Manufacturer Aero Precision Bear Creek Arsenal Black Rain Ordnance Bootleg Bravo Co. Mfg CMMG Colt Cryptic Coatings Daniel Defense Doublestar FailZero Geissele LBE Unlimited Lewis Machine & Tool Odin Works Palmetto State Armory Rise Armament Rubber City Armory Spikes Tactical TRUE Strategic Toolcraft WMD Guns Wilson Combat
Any Caliber .223 .300 Blackout .308 Winchester .350 Legend 5.56 NATO 6.5 Creedmoor 6.5 Grendel 6MM ARC 7.62 NATO 7.62x39mm 9x19mm
Any Model 9mm AR-15 AR10 AR15/M16 Bolt Carrier Group Bolt Gas Rings Lightweight/Low Mass Bolt Carr M16 M16/M4 M5 Mil-Spec SPEC15
Any Color/Finish Black Black Nitride Black Phosphate Bronze EXO FDE Gold MIdnight Blue Manganese Phosphate Matte Nib-X Nickel Boron Nickel Boron Coated Stainless
Any Platform AR AR-10 AR-15 AR308