https://en.wikipedia.org/wiki/Mosin–Nagant
The 3-line rifle M1891, colloquially (but mistakenly; see Nagant's legal dispute) known in the West as Mosin–Nagant and in Russia and former Soviet Union as Mosin's rifle (Russian: винтовка Мосина, ISO 9: vintovka Mosina), is a five-shot, bolt-action, internal magazine–fed military rifle.It is primarily found chambered for its original 7.62×54mmR cartridge.