The 30SD-K offers users a wide range of platform coverage from 7.62mm, 300BLK, 6.8spc, and 5.56mm using our variety of 30SD and M4SD mounts. 5.56mm firearms are supported with this suppressor via use of any of our M4SD mounts in addition to compatible A2 compensators. Unique to Griffin QD family suppressors is it's Gate-Lok mounting interface. The mounting system is one of the fastest on the market and accommodates USGI spec A2 compensators* (in 5.56mm) as well as Griffin's proprietary performance rich muzzle device options.Additionally the Gate-Lok mounting system does not suffer from the wear prone issues of ratcheting systems common to the marketplace.Our mounting system was designed to provide trouble free use. 30SD and M4SD mounts in the Gate-Lok family are precision ground to ten thousandths of an inch for minimal, repeatable and completely dependable point of impact shift. Built on years of development, the 30SD-K is the pinnacle of performance- the equal of the best competing products available anywhere in the world. Diameter: 1.5" Overall Length: 6.6" Weight: 17.8 Ounces Materials: High strength, high temperature, corrosion resistant 17-4PH Stainless Steel Attachment: Gate-Lok interface (30SD and M4SD 5.56 mounts) Finish: High Temp Cerakote 30SD Flash Comp mount included High temp Cerakote finish Included Silencer Pouch Included shim set Multi Caliber Friendly