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The heart of the M4SD K suppressor is a billet machined "chassis" tube body, with integrated muzzle device bearing surfaces, which houses the internal components. The "chassis" provides a housing substantially stronger than the strongest tube materials currently available. Through extensive, costly and time intensive machining of the "chassis", a tube structure of superior geometry is derived. The chassis is encompassed by a series of flutes surrounded by supporting structures affording enhanced strength to weight ratio- coupled with a 40% increase of surface area for unparalleled cooling. The M4SD K has surface area comparable to compact 7.62mm suppressors on the market. Reducing the internal operating temperature of the suppressor yields a superior product with a level of durability beyond that of current market options. Monolithic structure of the blast chamber and tube maximizes safety factor and provides maximum theoretical temperature transfer, allowing heat to normalize, mitigating the effects of erosion to baffle surfaces. Integrated at the request of elite tactical units, the included flash suppressor front cap further reduces flash signature in pursuit of suppressed superiority.The M4SD K offers users a wide range of mounting options using our variety M4SD mounts and compatible A2 compensators.Unique to Griffin M4SD family suppressors is it's SDQD mounting interface. The SDQD mounting system is one of the fastest on the market and accommodates the A2 nato compensator as well as Griffin's M4SD II series proprietary performance rich muzzle device options.Specs: Diameter: 1.5″ Overall Length: 5.75" Weight: 14.5 ounces Materials: High Strength, High Temp, Corrosion Resistant 17-4PH Stainless Steel Attachment: Griffin M4SD Mounts and USGI A2 spec compensators* Finish: High Temp Griffin Endura-Kote DB Attenuation: 31DB