Yankee Hill Machine Resonator Integral Suppressor for .300 AAC Blackout. Features a matte black finish with an overall length of 23.5 inches and a diameter of 1.375 inches. The suppressor is an integral design with a 17-4 PH stainless steel construction and an Inconel 718 blast baffle, and is pinned and welded to a 9.1 inch barrel.