Advanced Armament Corp ML13-SD, Suppressor, 300 Winchester Magnum, Titanium Construction, Cerakote Finish, Flat Dark Earth, 90T Taper Mount Compatible, 1.5 Diameter, No Mount Included 65008 The military-chosen Mk13-SD is an ultra-lightweight, fast-attach, high performance sound and flash suppressor engineered for bolt action rifles chambered in 300 Winchester Magnum and 7.62 x 51 mm.