The Mosin-Nagant is a bolt-action rifle that was developed in the late 19th century by the Russian Empire. It was designed by Captain Sergei Mosin and later modified by Leon Nagant. The rifle became the standard infantry weapon for the Russian army and was widely used during both World Wars. The Mosin-Nagant is known for its durability and accuracy, featuring a 5-round magazine and a distinctive curved bolt. It fires the 7.62x54mmR cartridge, which is still in use today. The rifle has a significant historical impact and remains popular among collectors and shooting enthusiasts.