Expo Arms Barreled AR-15 Upper Receiver - 5.56 - 10.5"

Faxon Firearms Mid-Length Button Rifled Gunner Barrel 5.56x45mm 16", Black

TacFire AR-15 .223 / 5.56 Unassembled Upper Receiver Kit - 10"

TacFire AR-15 7.62x39 Unassembled Upper Receiver Kit - 5"

AERO PRECISION AC-15M RIFLE - 5.56 NATO 16" BBL BLACK

AERO PRECISION M4E1-T 5.56 NATO 11.5" Complete Upper Receiver | Black

AERO PRECISION AR15 5.56 NATO / 223 Rem 20" Complete Upper Receiver w/ Carry Handle | Black

Lead Star Arms Barrage Rifle 5.56 16in 30Rd 15in Handguard Black