Featuring:

16″ 4150 CrMoV Steel
Mil-Spec 86L20 case hardened M4 extension
1/7 twist
Mid-length gas port
.750 gas block seat
Properly QPQ Nitrided, Polished extension
Marked ‘5.56 1/7 4150 CrMoV’
Reduced Profile – 26.3 ounces