Upper Receivers/Conv Kits

CMMG Resolute MK4 6mm ARC Upper with 16.1" Barrel, Black - 60B1091ABExperience the power and precision of the CMMG Resolute MK4 6mm ARC Upper! This cutting-edge upper receiver group is designed to deliver exceptional performance in a lightweight,...

Radical Firearms 16" Barrel 300 Blackout Complete Upper (RAFRF00375) This item ships free.  The Radical Firearms 300 Blackout upper provides a fully assembled MIL-STD upper that can seamlessly attach to any MIL-STD lower receiver. Whether...

LUTH-AR 16" Lightweight Barrel Complete Upper Receiver For 223 REM/556NATO - BAA3-L16 This item ships free.  The Luth-AR 16” Lightweight Complete Upper Barrel Assembly begins with a 16" lightweight barrel chambered in 223 Remington. This...

HM Defense Complete Upper 16" Barrel 5.56 AR-15 M-LOKHm Defenses Mission Is to Advance Ar15 / Ar10 Rifle Technology to Its Highest Level. They Strive To Create Rifles That Are More Accurate, Easier to Maintain and Dependable In Extreme Conditions.1...

HM Defense Complete Upper 16 Long Rail Barrel 5.56 AR-15HM Defense's Mission Is To Advance Ar15 / Ar10 Rifle Technology To Its Highest Level. They Strive To Create Rifles That Are More Accurate, Easier To Maintain And Dependable In Extreme Conditions.1...