Caliber: 5.7mm to .300 WM - Muzzle Average dB: 119.5 (.300 BLK) 130.1 (5.56 NATO) 133.9 (.308 Win) - Materials: Titanium Stellite & Stainless Steel - Color: Black - Diameter: 1.56 - Length: 7.09 - Weight: 14 oz. - The best of all worlds: the Omega� is the lightest shortest quietest full auto rated titanium .300 caliber (7.62mm) centerfire rifle silencer on the market. It�s also the best selling rifle silencer in history. Comes complete with direct thread and fast attach mounts as well as a removable Anchor Brake� to reduce recoil which can be replaced with a flat front cap.