M91-30 q

Close up of receiver, bolt pulled to the rear with bullet in magazine ready to load into the chamber.

Mosin-Nagant M91/30, Russia, 7.62x54R, bolt action, five round integral box magazine, produced from 1891-1965, length - 51.4 in., weight - 9.6lbs (empty).
Originally used in the (late) Czarist Russia, the Soviet Union and it's Eastern European satelite states, later found in parts of Asia (China, North Korea, Viet Nam) and some countries in the Middle East.

This particular model was produced in 1943.

For further information on this as well as it's variants, check out Wikipedia [link]