The Soviet/Russian ZSU-23-4 Shilka self-propelled anti-aircraft mounting

By the mid-1950s, it was clear that the days of the ZSU-57-2 self-propelled anti-aircraft gun mounting were numbered in terms of the system’s operational capability. For all the destructive effect of its large projectiles, the S-68 cannon possessed too low a rate of fire; the poor rates of traverse and elevation made it all but …