The G5 is a thoroughly tested and improved suppressor, that provides durability in a lightweight, strong package. Titanium, stainless steel and inconel construction ensures that the G5 is suited to handle any task. The G5 mounts to a Gemtech Quickmount muzzle device (sold separately), allowing for fast attachment and removal of the suppressor. Mfg: Gemtech SPECS: Caliber - 5.56mm NATO / 223. Weight - 18.8oz. Length - 7". Diameter - 1.5". Materials - Stainless steel, Inconel & titanium. Finish - Matte black Cerakote with reduced visual-IR signature. Attachment - Flash Hider Quickmount (not included). Reduction - 32dB.