All Wilson Combat Match Grade AR barrels are precisely crafted of the finest American-made 416R rifle rated steel on computer controlled equipment to their exacting list of technical specifications. These proven barrels feature a hand-polished bore and feedramps and then complete a rigorous final inspection process that ensures your new barrel will meet your most demanding expectations. All barrels feature crisp CNC markings” precision muzzle crown and a chamber and gas port optimized for reliability.