Manufactured from 1941 the ZIS-3 divisional gun gave admirable service during WW2 and the Korean and Vietnam wars. It was significantly lighter than other contempory designs and proved a capable AT gun and artillery piece.
Effective mid-war tank destroyer based on the T34 hull mounting an 85 AA gun. This became obsolete when a new turret developed for the T34-85 gave the tank the same fire power. This prompted the development of the SU-100 in 1944.