The Mosin-Nagant (Russian: Винтовка Мосина, ISO 9: Vintovka Mosina) is a bolt-action, internal magazine fe, military rifle that was used by the armed forces of Imperial Russia and later the Soviet Union and various Eastern bloc nations. Also known as the Three-Line Rifle (Трёхлинейная винтовка, ISO 9: Trëhlinejnaâ vintovka), it was the first to use the 7.62x54mmR cartridge. As a front-line rifle, the Mosin-Nagant served in various forms from 1891 until the 1960s in many Eastern European nations, when the sniper rifle variant was replaced by the SVD (Снайперская винтовка Драгунова, ISO 9: Snajperskaâ vintovka Dragunova). The Mosin-Nagant is still used in many conflicts due to its ruggedness and the vast number produced during World War II.