This YHM 14.5 M4 5.56 NATO Mid-Length barrel was designed around the USASOC specs for an Improved Upper Receiver Group. The longer, mid-length gas system allows for a smoother gas curve which leads to managed dwell times. This combo creates a great balance of speed and performance. ALL NFA RULES APPLY!

• Barrel Length: 14.5″
• Weight: 26.34oz.
• Material: 4150 Chrome Moly Vanadium
• Chamber: 5.56mm
• M4 Feed Ramps: Yes
• Profile: M4
• Twist Rate: 1 in 7″
• Gas Block Journal Size: .750″
• Gas System length: Mid-Length
• Muzzle Crown: 11 Degrees
• Muzzle Thread Pattern: 1/2″ x 28
• Finish: Nitride