Simo "Simuna" Häyhä was a Finnish military sniper in the Second World War during the 1939–1940 Winter War against the Soviet Union. He used a Finnish-produced M/28-30, a variant of the Mosin–Nagant rifle, and a Suomi KP/-31 submachine gun. Häyhä is believed to have killed over 500 men during the Winter War, the highest number of sniper kills in any major war.
