Perfect for building your custom AR15 upper group. Comes with a properly installed M4 barrel extension. All barrel sub-assemblies are properly headspaced.
Specifications:
- Caliber: 300 Blackout
- Length: 16.1″
- Material: 4140 Chrome Moly Vanadium
- Contour: Multi-Role
- Finish: SBN(Salt Bath Nitride)
- Gas System Length: Carbine
- Gas Block: 0.750″
- Twist Rate: 1:7 inches
- Muzzle: 5/8×24 Threaded
SKU: BAR55617-7SS
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