AZP S-60
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AZP S-60 is a Soviet towed, road-transportable, short- to medium-range, single-barrel anti-aircraft gun from the 1950s. The gun was extensively used in Warsaw Pact, Middle Eastern and South-East Asian countries. Wikipedia
Action: Recoil operated
Barrel length: 4.4 m (14 ft 5 in)
Caliber: 57 mm (2.24 in)
Crew: 7
Designer: Vasiliy Grabin
Effective firing range: 6,000 m (20,000 ft) (radar guided); 4,000 m (13,000 ft) (optically guided)
Elevation: −4° to +85°