The M167 Vulcan Air Defense System (VADS)[5][6][7][8] is a towed, short-range United States Army anti-aircraft gun designed to protect forward area combat elements and rear area critical assets.

The two versions of the Vulcan Air-Defense System, the towed M167 and self-propelled M163 VADS, were developed by the United States Army Weapons Command at Rock Island Arsenal in 1964.

[1] Starting in 1994, the M167 was replaced in U.S. service by the M1097 Avenger missile launcher and in 2005, by a ground-based version of the Phalanx CIWS self-defense gun[9] which the U.S. Navy uses on its ships.

[10] It also had an extra wheel put on each side which prevented flipping by providing a longer lever.

[11][12] An M167 mounted on a Toyota Land Cruiser as a “technical” has been sighted in action in Yemen with the Houthi.