Description
Barrel Subassm 16.1in MT 4140CM SBN 5.56
Perfect for building your custom AR15 upper group - Comes with properly installed M4 barrel extension - All barrel sub-assemblies are properly headspaced
Description:
- 16.1″
- Medium Taper Profile
- 4140 Chrome Moly
- Salt Bath Nitride Finish inside and out
- 1:7 Twist
- 5.56×45 NATO Chamber
- Threaded 1/2-28
- Midlength gas port
- .750″ Gas Journal