The Blüm machine gun (Russian: Пулемёт Блюма) was a Soviet training machine gun designed by Mikhail Nikolayevich Blüm around 1929. It was chambered for the .22 Long Rifle cartridge. The gun was developed in order to reduce the training costs in terms of ammunition and wear of the Soviet machine guns in service at the time. Known production figures for this gun at the Degtyarev plant are: 33 made in 1933, 1,150 made in 1934 and 1,515 made in 1935.