Ballistic Advantage Performance Series Bead Blasted 5.56 NATO 17.7 Barrel

Performance Series Features This 5.56 chambered 17.7 inch Performance Series Barrel is machined from 4150 Chrome Moly Vanadium steel with a QPQ Corrosion Resistant Finish. Our Performance Series barrels feature a Nickel Boron Coated Extended M4 Feed Ramp Extension. Performance Series Specifications Model: Performance Series Length: 17.7 Material: 4150 Chrome Moly Vanadium Profile: Hanson Finish: QPQ Corrosion Resistant Twist Rate: 1:7 inches Gas System Length: Mid-Length Gas Block Journal: 1.03a ^2 Gas Block Seat for .750a ^2 Low Profile Gas Blocks Only Muzzle: 1/2x28 Threaded Weight: 31oz