ZSU-57-2

The ZSU-57-2 (Zenitnaya Samokhodnaya Ustanovka) is a lightly armoured, self propelled Soviet air defence cannon (SPAAG). It mounts two 57 mm cannons on a tank chassis (a modified T-54 with thinner armour). It was developed in the 1950s but found to be unsatisfactory and replaced with smaller caliber, faster-firing cannons in the ZU-23-2 and ZSU-23-4 Shilka. The fire-control system is purely optical (no radar).

The vehicle weighs 28 tonnes (31 tons), has a crew of six and can fire bursts up to 120 rounds per minute from each gun, with a sustained rate of fire of around 70 rounds per minute per gun, for 140 rounds per minute total. Maximum effective range is around 4 km (2.5 mi), maximum effective altitude is around 4250 m (14,000 ft). 300 rounds of ammunition are carried in each vehicle.

The People's Republic of China's Type 80 air defence tank has the same turret as the ZSU-57-2 mounted on a different amphibious chassis.