Perfect for building your custom AR15 upper group. Comes with a properly installed M4 barrel extension. All barrel sub-assemblies are properly headspaced.
Features and Specifications:
- CALIBER: .300 BLK
- BARREL LENGTH: 16.1
- BARREL TWIST: 1:7
- BARREL CONTOUR: MULTI ROLE
- BARREL MATERIAL: 4140CM
- BARREL TWIST: 1:7
- MUZZLE THREAD: 5/8 X 24
- GAS PORT LOCATION: CARBINE
- GAS BLOCK: 0.750"
- FINISH: SALT BATH NITRIDE
