High Quality Content by WIKIPEDIA articles! The PM M1910 (Пулемёт Максима на станке Соколова, Pulemyot Maxima na stanke Sokolova or "Maxim`s machine gun model 1910 on Sokolov`s mount") was a heavy machine gun used by the Russian Army during World War I and the Red Army during World War II. It was adopted in 1910 and was derived from Hiram Maxim`s Maxim gun, chambered for the standard Russian 7.62x54mmR rifle cartridge. The M1910 was mounted on a cumbersome wheeled mount with a gun shield and was replaced in Soviet service by the SG-43 Goryunov, starting in 1943. In addition to the main infantry version, there were aircraft mounted (PV-1) and naval variants.