The M1891 Rifle, also known as the Mosin-Nagant, is a bolt-action rifle that was developed in Russia and adopted by the Imperial Russian Army in 1891. It was designed to fire the 7.62×54mmR cartridge, making it one of the oldest military cartridges still in use today. The rifle features a five-round internal magazine and is known for its durability and reliability in various combat conditions. The M1891 played a significant role in several conflicts, including World War I and World War II. Its design influenced many subsequent rifles, and it remains popular among collectors and shooting enthusiasts. The rifle's historical significance and robust construction contribute to its lasting legacy in military history.