ZB-60

Design efforts started in the early 1930's for a 20mm automatic gun for anti-tank service. In 1933, the design parameters were altered to the 15×104mm Škoda round as a large caliber heavy machine gun. As early as 1934 the ZB-60 was tested by the Czechoslovak military, which did not adopt it due to accuracy concerns and excessive recoil even with its weight. For several years it was planned as a fortification gun where the recoil could be easily managed by stronger mounts, until the heavy machine gun was dropped from the fortification concepts. Nazi Germany acquired a number of guns after the occupation of Czechoslovakia in March 1939 were taken into Wehrmacht service as the 15 mm Fla. MG 39(t). Under German occupation, new guns were produced for the Wehrmacht and Kriegsmarine. After the Invasion of Yugoslavia, former Yugoslav guns were designated as the 15 mm Fla. MG 490(j). The Germans used them as anti-aircraft guns during World War II. The British acquired a license, and later developed their 15 mm Besa machine gun from the ZB-60 for service on armored fighting vehicles.

Germany Iran − A batch was sold to Iran. Slovakia United Kingdom Yugoslavia − In 1937 the ZB-60 was adopted by Yugoslavia as the Mitraljez 15 mm M.38 and the UK acquired a license.