Historic military sniper rifles up to and including the Second World War were usually based on the standard service rifle of the country in question. They included the German Mauser Gewehr 98K, U.S. M1903 Springfield and M1 Garand, Soviet Mosin–Nagant, Norwegian Krag–Jørgensen, Japanese Arisaka, and British Lee–Enfield No. 4. Models used for sniping were generally factory tested for accuracy and fitted with specialized components, including not just optics but also such items as slings, cheek pieces, and flash eliminators, which disperse gases at the muzzle away from the sniper's view, helping avoiding having the sniper blinded by the flash.