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The system saw active service in the Six-Day War (1967) and other Israeli-Arab conflicts, the First Gulf War (1990), and probaly in the various Indo-Pakistan clashes.
Based on the chassis of the PT-76 light tank, the system mounts an armoured turret holding four liquid-cooled AZP-85 23 mm cannons linked to a RPK-2 " Gun Dish " 30 mm Radar. Post-Soviet versions can be fitted with a different gun (twin 30 mm 2A38M) and different radar. The vehicle weighs 20.5 tonnes, has a range of 450 km and a top speed of 50 km/h. Additional firepower is supplied by a roof-mounted pod of six SA-18 SAMs, or side mounted SA-16s. The guns have an effective range of 2.5 km and are useful against the slower low-flying aircraft and also lightly protected ground targets. The crew numbers four: driver, commander, and two radar personnel - gunner and ranger.
Soviet doctrine supplied the vehicle in a platoon of four to support MI or tank regiments in conjunction with SA-6 and SA-9 teams. The system is very vulnerable to enemy fire, the armour is thin (maximum of 10 mm) and the exposed suspension, wheels, track, radar, and gun barrels can be easily damaged.