After their experience against the Soviets on the Eastern Front, the Hungarian military leaders requested a self-propelled assault gun to aid in their efforts against the hordes of Soviet armour. Based on the hull of the Turán tank, the Zrínyi II mounted a 105mm 43M howitzer. Plans for the proposed Zrínyi I mounting a German 75mm gun were cut short when the Americans bombed the factory. Only one prototype was built.