The Maschinengewehr 34, or MG 34, is a German recoil-operated air-cooled machine gun, first tested in 1929, introduced in 1934, and issued to units in 1936. It accepts the 7.92×57mm Mauser cartridge, and is generally considered the world's first general-purpose machine gun.The versatile MG 34 was arguably the most advanced machine gun in the world at the time of its deployment.