Chaos Gear Supply Helios QD, Suppressor, .36 Cal, 6.5" Length, 1.75" Diameter, 718 Inconel and 17-4 Stainless Steel Construction, DLC Finish, Black, HUB Compatible, Includes 1/2X28 Rear Cap, 5/8X24 Rear Cap, and HUB Adapter Ring, 19oz CGS-HELIOS556-QD