FN AR-15 5.56x45mm NATO 14.7" M4 Profile Barrel

The FN AR-15 14.7" M4 Profile Barrel is a replacement barrel for AR-15 builds using a carbine-length gas system. It is chambered in 5.56x45mm NATO and is also listed for .223 Remington.

This 14.7" barrel uses a button-rifled 1:7 right-hand twist bore and an M4 profile. Its M4-style feed ramps and barrel extension support AR-15 assembly, while the threaded muzzle allows installation of a compatible muzzle device.

Made from chrome-moly-vanadium steel, the barrel has a chrome-lined bore and chamber and a matte black manganese phosphate finish. It is high-pressure tested and magnetic-particle inspected.