The Degtyaryov machine gun (Russian: Пулемёт Дегтярёва Пехотный, romanized: Pulemyot Degtyaryova Pekhotny , lit. 'Degtyarev Infantry Machinegun' or DP-27/DP-28 is a light machine gun chambered in the 7.62×54mmR cartridge that was primarily used by the Soviet Union, with service trials starting in 1927, followed by general deployment in 1928.