152-mm howitzer M1938 (M-10) () was a Soviet 152.4 mm (6 inch) howitzer of World War II era. It was developed in 1937-1938 at the Motovilikha Mechanical Plant by a team headed by F. F. Petrov. Although production of the gun was stopped in 1941, it saw combat with the Red Army until the end of World War II and remained in service until the 1950s. Captured pieces were used by Wehrmacht and the Finnish Army. The latter kept the M-10 in service until 2000. In a tank-mounted variant, M-10T, the gun was mounted on the KV-2 heavy tank.