The M163 VADS (Vulcan Air Defence system) is a self propelled anti-aircraft gun used by the US Army that was based on the M113 Armored Personnel Carrier. It was a fast, lightly armored, amphibious (can reach up to 4 mph, but only forward), nimble platform that could carry up to 13 personnel to the battle - including crew. The M163 was put in service in 1969 and while it’s no longer produced (671 vehicles were built), it was never decommissioned. M163 VADS was powered by a GM 6V53 diesel engine with a maximum of 212 horsepower. With its low weight of 12.5 tons, it was capable of reaching 40 mph (64 km/h). The SPAAG itself was operated by a four-men crew.
