The 16" M4 5.56 NATO Bloodline Barrel (Mid-Length). This 16" 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.

Features :

• "16", Mid Length Gas System"
• 1/2x28 Muzzle Threading
• 1/7 Twist
• 4150 CMV Construction
• Nitride Finish