Barrels are engraved CMMG MPC 5.56 NATO 1:9. Each upper is head spaced and test fired before shipping. The upper is built off of our standard forged A3 receiver with M4 feed ramps. The barrel is 4140 steel, Bull Barrel profile, 5.56mm chamber and bore and 1:9 twist ratio.
- 5.56x45 NATO chamber
- 1:9 twist
- 11 degree recessed target crown
- Stainless Steel Barrel
- Forged M4 upper receiver is T marked and has M4 feed ramp cuts
- Semi Auto bolt carrier
- Mil-spec .250 diameter take-down pins