Ballistic Advantage BABL556014MC Classic Series 5.56x45mm NATO 16″ Threaded M4 Profile Chrome-Lined, Carbine Length Gas System, Black Phosphate Chrome Moly Vanadium Steel, Fits AR-15

BA’s 5.56 chambered 16 inch M4 Carbine Length Classic Series Barrel is machined from CrMoV steel with a chrome lined bore and chamber with a manganese phosphate finish and phosphate coated M4 feed ramp extension.