So according to the leaks USSR is getting a premium pack at BR 5.7 it will include the IS-1, T-34/85 and a captured Sd.Kfz 251/21. Instead of getting a captured Sd.Kfz 251/21 which will have a BR of 3.3 could be please get the Czechoslovakia T-34-57 with a R10 AA 57mm cannon.
From what I could find it couldn’t use ammunition from the S-60 57mm. The R10 57mm only had HE shells but had a fire rate of 180 rounds per minute.
I think this would be a much better option for a BR 5.7 premium pack than a German SPAA at BR 3.3
