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. Grade 5 Titanium monolithic baffle core and Grade 9 Titanium tube give the Mk13-SD an improbable weight of 15 ounces and the durability to withstand the 300 Win Mag muzzle pressures and temperatures Small size and light weight it delivers greater sound reduction and accuracy than any similarly-sized competing model