This 350 Legend chambered 16 inch Performance Series Barrel is machined from CrMoV steel with a QPQ Corrosion Resistant Finish. Our Performance Series Barrels feature a Nickel Boron Coated Extra Wide Feed Ramp Extension. Hanson Series Barrels feature our proprietary BA Hanson profile and include a pinned Lo-Pro gas block. Hanson barrels are not designed to work with aftermarket piston kits. Important: A standard 5.56 1/2x28 flash hider will not have enough clearance for a 350 round to pass. Use a 350 Legend muzzle device or one designed for .350 Legend rounds. Before installing a muzzle device, ensure a 350 Legend round will drop freely through the muzzle device bore.