The new CHECKMATE-HD is a 5.8 ounce 5.7x28 pistol rated rimfire suppressor and utilizes ECO-FLOW baffle technology as well as newly developed CARBON-GARD technology- the subject of a pending patent. The 5.8 ounce, 5.04" overall length suppressor features a 17- 4 heat treated ECO-FLOW baffle system, and front cap. The tube is 7075-T6 billet machined and hardcoat anodized for maximum strength. Brand: Griffin Armament Category: Suppressors Series: HD22 (DIRCT TH) Model: Checkmate Color: Black Material: Polymer Finish: Hardcoat Anodized