ZiS-2

Description
Firing the 57mm L/69.3 the gun has a very high muzzle velocity and can pierce most german tanks provided it is close enough.

History
Originally designed from fear of german heavy tanks built to counter the soviet use of heavy tanks in the winter war. The long caliber was decided on to ease concealing the gun whilst not sacrificing penetration.

The production was temporarily stopped until the introduction of the german heavy tank Tiger 1 which prompted the continuation of the production of theese guns.