The new CHECKMATE-HD is a 5.8 ounce 5.7×28 pistol rated rimfire suppressor and utilizes ECO-FLOW baffle technology as well as newly developed CARBON-GARD technology. The 5.8 ounce, 5.04″ overall length suppressor features a 17- 4 heat treated ECO-FLOW baffle system, front cap, and integrated EZ-LOK QD mounting system. The tube is 7075-T6 billet machined and hardcoat anodized for maximum strength.