Barrel Sub-Assembly - 16.10? Bull 4140CM SBN, 5.56mm

Barrel Sub-Assembly - 16.10? Bull 4140CM SBN, 5.56mm
Manufacture ID: 55DAC0B

Perfect for building your custom AR15 upper group, the Bull profile improves shot to shot consistency during long strings. Every barrel comes with properly installed M4 barrel extension. All barrel sub-assemblies are properly headspaced.

Specifications:

- Length: 16.1?
- Profile: Bull
- Material: 4140 Chrome Moly
- Finish: Salt Bath Nitride Finish inside and out
- Twist: 1:7
- Caliber: 5.56e45 NATO Chamber
- Gas Port: Mid length
- .936? Gas Journal