Ar15 Upper Receivers

Stern def.Upper 9mm 16.1" 15" m-lok handguard black FEATURES:Caliber: 9mmTwist: 1:10"Barrel Length: 16.1"Threaded: .5-36Charging Handle Laser engravedMade in U.S.A. Other Features: Complete upper includes bolt, 15" mod 4 m-lok handguard, glock cut...

Aero precision m4e1t complete upper 10" barrel 300blk Other Features: M4 feedramps.250 takedown pin holes laser engraved t-marks inclds port door and fwd, assist installed m4e1 threaded assmbld upper atlas r-one handguard of choic 10".300blk cmv barrel...

Aero precision m4e1t complete upper 16" barrel 5.56/.223 Other Features: M4e1 threaded upper receiver forged 7075-t6 aluminum 15" atlas s-one mlok handguard hardcoat anodized, 1:7 twist threaded 1/2x28, a2 flsh hider assembled forward assist, and dust...

Aero precision ar15 complete upper 20" carbine 5.56/.223 Other Features: Standard ar15 upper receiver 20" 5.56 carbine barrel, with pinned fsb, a2 flsh hider a2 hanguard carbine length gas system this complete upper does not, includes a bcg or chg...

Stern def.Pistol upper 9mm 6" bbl.8" m-lok rail FEATURES:Caliber: 9mmTwist: 1:10"Barrel Length: 6"Threaded: .5-36Charging handle Laser engravedMade in U.S.A. Other Features: Complete upper includes bolt, 8" mod 5 m-lok handguard, glock cut upper ready...

Aero precision m4e1t complete upper 8" barrel 300blk Other Features: M4 feedramps.250 takedown pin holes laser engraved t-marks inclds port door and fwd, assist installed m4e1 threaded assmbld upper atlas r-one handguard of choic 8".300blk cmv barrel...