Rosco Bloodline Series M4 5.56 NATO Gov Mid-Length
M4 5.56 NATO Mid-Length barrel was designed around the USASOC specs for an Improved Upper Receiver Group with a little bit of the Rosco touch as well. The longer gas system allows for a smoother gas curve which leads to managed dwell times. This combo creates a great balance of speed and performance.
| Barrel Caliber | 5.56 | |
| Barrel Profile | M4 | |
| Twist | 1/7 | |
Barrel Thread | 1/2 x 28 | |
Gas Block Size | .750 | |
Gas System Length | Mid-Length | |
| Barrel Crown | 11 Degree | |
| Barrel Finish | Nitride | |
| Barrel Extension Finish | Nitride |
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