Actually, they have even less range than the marderRange comparison:Marder and geshutzwagon: 6057mm AT gun: 60Firefly: 55SU-57:50Panther: 47.5Jagdpanther and other supertanks: 45Tiger and most other tanks: 40And if you still want a justification for it being used in game the way it is compared to real life, the SU76 were not that bad against the majority of medium tanks such as the stug and panzer IV, and when supplied with tungsten cored APCR rounds (which soviets seemed to be the only country to have a decent supply of) they could take out heavy tanks at closer range, or at greater ranger when aiming at the sides
I think that the model of su76 is too big.It has the same underpan as T-70 in real world,but in game it is much bigger than t-70.Almost the same size as t-34