What difference can a lone marksman make? What does it mean to be a force multiplier? Simo Häyhä December 17, 1905 April 1, 2002), nicknamed "White Death" by the Red Army, was a Finnish marksman. Using a modified MosinNagant in the Winter War, he has the highest recorded number of confirmed sniper kills 505 in any major war. Just to put that into perspective, a lone rifleman, using a Mosin Nagant ( he used iron sights) became a human weapon, dispatching 505 men in 100 days. Class dismissed.