Because affordable and great dependability the troop provider M113 presented it self as a legitimate base for different anti-tank tools systems such as TOW missiles or an anti-aircraft device such as this variation. The M163 was developed around a 20 mm gun Vulcan. Rotating barrels (with an abrupt fire power of 6000 rounds for each minute) have been completely designed for anti-aircraft use. The complete system is based on an easy