The M1891, also known as the Mosin-Nagant, is a bolt-action rifle that was first adopted by the Russian Empire in 1891. It was designed by Sergei Ivanovich Mosin and Leon Nagant and became a standard infantry weapon for Russian and later Soviet forces. The rifle is chambered for the 7.62×54mmR cartridge, which provides significant firepower and range. The M1891 saw extensive use during various conflicts, including World War I, the Russian Civil War, and World War II. Its robust design and reliability in harsh conditions made it a favored choice among soldiers. The rifle has since become a popular collector's item and is appreciated for its historical significance.