Ballistic Advantage

Ballistic Advantage's 5.56 NATO chambered 13.9 inch Government Profile Mid-length Modern Series Barrel is machined from 4150 Chrome Moly Vanadium steel with a QPQ Corrosion Resistant Finish and QPQ coated M4 feed ramp extension. Features : - "Length: 13.9";"Material: 4150 Chrome Moly Vanadium" - Profile: Government - Finish: QPQ Corrosion Resistant - Twist Rate: 1:7 inches - Gas System Length: Mid-Length - "Gas Block Journal: .750";"Muzzle: 1/2x28 Threaded"