9x18mm Makarov was designed to be used in the Makarov PM pistol, and was adopted by the Soviet army in 1951. Soon it was found in a variety of weapons, including the Skorpion vz. 82. Although not in wide military use now, the 9x18mm remains popular among firearms enthusiasts. https://ammunitionexport.com/product/tulammo-9mm-makarov-ammo-1000-rounds-of-92-grain-fmj-ammunition/