Wilson Combat TR556RCRG18FT8: Wilson Combat\'s stainless steel, match grade barrel offers superior accuracy, reliability and longevity for your next custom AR rifle project. It is precisely crafted of the finest American-made 416rd rifle rated steel on computer controlled equipment to exacting list of technical specifications. The barrel features a hand-polished bore and feedramps, crisp CNC markings, precision muzzle crown and a chamber and gas port optimized for reliability.