Ballistic Advantage BABL557103MC Classic Series Carbine Government 5.56x45mm NATO 10.30″ Threaded Black Phosphate Chrome Moly Vanadium, Fits AR-15

This 5.56 chambered 10.3 inch Government Profile Classic Series Barrel is machined from CrMoV steel with chrome lined bore and chamber with a manganese phosphate finish and phosphate coated M4 feed ramp extension.