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.