The M163 Vulcan Air Defense System (VADS) is a self-propelled anti-aircraft gun (SPAAG) that was used by the United States Army. The M168 gun is a variant of the General Dynamics 20 mm M61 Vulcan rotary cannon--the standard cannon in most US combat aircraft since the 1960s. - - The weapon is either mounted on a modified M113 vehicle (the M741 carrier) or on a towed trailer, which is designated the M167. The systems were designed to complement ...
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