AAC 762-SDN-6 Rifle Silencer 7.62mm NATO/.300 AAC Blackout - AAC 762-SDN-6 Compact fast-attach sound and flash suppressor for 7.62x51mm and 300 AAC Blackout (7.62x35mm) weapons. It is 1.25 inches shorter than the 762-SD and features a fully welded all-Inconel baffle stack and front end cap to maximize durability on select fire 7.62mm SBRs. Fits the following muzzle devices 51T Ratchet Mount(TM)