The M-55A 20MM, also known as the Zastava M55, is a Yugoslavian/Serbian triple-barreled automatic anti-aircraft gun. The Crvena Zastava company produced it for the Yugoslav People’s Army.
Later versions had an attached generator that provided power traversing and a better computer-assisted sight alignment. The gun is a daylight, clear weather-only system. Multiple variants exist, such as the towed M55 A2 and the BOV-3, an all-wheel drive armoured vehicle.
The M-55A 20MM remains in service in Tunisia and the countries of the Former Republic of Yugoslavia.
Weight of Projectile: .313 pounds (.142 kilograms)
Range: 6,015 yards (5,500 metres)
Detachment: Gun, towing vehicle and 6 Gunners