"2.921"^^ . "2.85496"^^ . "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 U.S. combat aircraft since the 1960s, mounted on either an armored vehicle or a trailer."@en . . "4.8641"^^ . "1.24931e+07"^^ . . . . . "M163 VADS"@en . . . . .