Receivers/Uppers

This Mark 12 Mod 0, ready to shoot 5.56 upper is equipped with a 18" Douglas 416 stainless steel barrel (available with1:7 or 1:8 twist) with a fitted bolt and commercial carrier, flat-top receiver, PRi flip up front gas block front sight and rear sight, rifle length gas tube, a Gas Buster charging ..

This Mark 12 Mod 0 Retro Gen II, ready to shoot 5.56 upper is equipped with a 18" Douglas 416 stainless steel barrel (available with 1:7 or 1:8 twist) with a fitted bolt and commercial carrier, flat-top receiver, PRi flip up front gas block front sight with thumb screw elevation adjustment and rear ..

This Mark 12 Mod 0, ready to shoot 5.56 upper is equipped with a 18" Douglas 416 stainless steel barrel (available with 1:7 or 1:8 twist) with a fitted bolt and Full Autol carrier, flat-top receiver, PRi flip up front gas block front sight and rear sight, rifle length gas tube, a Gas Buster charging..

300 AAC BLACKOUT UPPER ASSEMBLYSPECIFICATIONS:300 AAC Blackout Barreled upper receivers can be used on existing MSR-type lower receivers Bushmaster 4150 chrome moly-vanadium steel barrels feature hard-chrome lining in both bore and chamber for extended barrel life..

This .50 BMG upper conversion kit for Barrett 82 A1 rifles includes a flat dark earth cerakote receiver, 29" parkenized black fluted barrel, and a 10 round magazine...

Complete upper assembly for M82A1 to shoot .416 Barrett from standard .50BMG lower receiver..

Complete .50 BMG 20" Barrel upper assembly for M82A1 ..

Complete .50 BMG 29" Barrel upper assembly for M82A1..

This .416 Barrett upper conversion kit for Barrett 82 A1 rifles includes a flat dark earth cerakote receiver, 29" parkenized black fluted barrel, and a 10 round magazine...

The Patrolman is the classic M4-style upper assembly, featuring a mil-spec, forged removable carry handle for shooting with iron sights or optics. It will drop-in to virtually any standard AR-15 lower receiver. Complete with a standard A2-style dual aperture rear sight in a removable carry handle wi..

Bushmaster, AR Lower Receiver, Multicaliber, Black Finish, TelestockModel: AR Action: Semi-automatic Type: Lower Caliber: 223 Rem Caliber: 556NATO Barrel Length: N/A Finish/Color: Black Grips/Stock: Telestock Subcategory: Lower Receivers..

Bushmaster, 92956, Lower, Semi-automatic, Lower, 223 Rem, 556NATO, N/A, Black, BlackModel: XM-15 Model: Lower Action: Semi-automatic Type: Lower Caliber: 223 Rem Caliber: 556NATO Barrel Length: N/A Finish/Color: Black Grips/Stock: Black Subcategory: Lower Receivers..