Sergei Ivanovich Mosin was a Russian Major General, engineer, and the main contributor to the design of the 3-line rifle, Model 1891, colloquially known as the Mosin–Nagant.
The Fabrique d'armes Émile et Léon Nagant, later known as L. Nagant & Cie, Liège, was a Belgian firm established in Liège in 1859 as a manufacturer of firearms and later automobiles.
Sergei Ivanovich Mosin
…division. It was at Tula where Mosin began his career as a weapons designer by first making improvements to the Berdan II and later collaborating with Nagant to design the Rifle of Three Lines of the Year 1891. Some details in Mosin's rifle were borrowed from Léon Nagant's design. One such detail is the…