Because affordable and great reliability the troop provider M113 presented it self as a legitimate base for various anti-tank tools systems including TOW missiles or an anti-aircraft unit similar to this variation. The M163 was created around a 20 mm weapon Vulcan. Rotating barrels (with an abrupt fire energy of 6000 rounds for each moment) have been completely designed for anti-aircraft use. The entire system is founded on a straightforward
