FN AR-15 Barrel 5.56x45mm NATO 14.7" Government Contour 1:7" Twist Manganese Phosphate

FN ARA 15 premium button rifled barrels are are manufactured using U.S. sourced Chrome Moly Vanadium material per Mil-B-11595E. Each barrel is High Pressure Tested (HPT) and Magnetic Particle Inspected (MPI) to ensure that it is free of microA stresses or flaws, resulting in consistency and quality in every barrel shipped from the factory. The bore and chamber are chrome lined to help resist corrosion and provide resistance to heat erosion which greatly improves barrel life and reliable chamberi