FN AR-15 5.56 NATO 16" M4 Profile Carbine Length Gas System Barrel, Black Phosphate - 20100046

FN premium button-rifled AR-15 barrel chambered in 5.56 NATO with a 16" carbine length gas system and M4 profile. The barrel features a chrome-lined bore and chamber for corrosion resistance and extended barrel life, with M4 style feed ramps. Each barrel is manufactured from U.S. sourced Chrome Moly Venadium material per Mil-B-11595E, high pressure tested (HPT), and magnetic particle inspected (MPI) for quality assurance.