Liberty Precision Machine DUTY 5.56. Compact 5.56/6mm suppressor designed for high holistic signature reduction on gas-operated firearms. Moderate gas blowback with high muzzle sound suppression. 5.1" long, 11.7 oz (without mount), 1.75" diameter. 1.375-24 HUB mounting, ships with DLC titanium 1/2-28 direct thread adapter. Full-auto rated, 7.5" min barrel. Graphite Black Cerakote. Lifetime warranty. Note: If this product is reflected as in-stock it means it's either physically in-stock or allocated and available (serial number is assigned) at my distributor