FN America Ar15 Barrel 16inch Hf M4 5.56 Carbine. 56 Carbine AR15 is an excellent way to make sure you have a long lasting and reliable barrel for any shooter. These Rifle Barrels from the experts at FN America are chrome lined to reduce internal corrosion and provide reliable chambering and loading. With an M4 style feed ramp and barrel extension the FN America AR15 16in HP M4 5.56 Carbine Barrel provides consistent feeding. Plus with its matte black manganese phosphate finish this FN America AR15 Precision Barrel will resist corrosion and oxidation. When you need a new barrel look to the FN America AR15 16in HP M4 5.56 Carbine Replacement Barrel. Package Contents: FN America Ar15 Barrel 16inch Hf M4 5.56 Carbine The FN America Ar15 Barrel 16inch Hf M4 5.56 Carbine is a quality addition to the FN America lineup. For more great deals on AR15 Barrels by FN America please browse our FNH USA Gun Parts page.