Sergei Ivanovich Mosin

Sergei Ivanovich Mosin (, - February 8, 1902) was a Russian Major General, engineer, and the main contributor to the design of the 3-line rifle, Model 1891 (Russian: "трёхлинейная винтовка образца 1891 года"), colloquially known as the Mosin–Nagant. Provided by Wikipedia