The Ford MGM-51 Shillelagh was an American anti-tank guided missile designed to be launched from a conventional gun (cannon). It was originally intended to be the medium-range portion of a short, medium, and long-range system for armored fighting vehicles in the 1960s and '70s to defeat future armor without an excessively large gun. Developing a system that could fire both shells and missiles reliably proved complex and largely unworkable for the United States.
MGM-51 Shillelagh
MGM-51 Shillelagh fired from a Sheridan
White Sands Missile Range Museum Shillelagh display
M60A2 "Starship" at the American Armored Foundation Museum in Danville, Virginia, July 2006.
The MBT-70 was an American–West German joint project to develop a new main battle tank during the 1960s.
MBT-70 (Kfpz-70)
Interior arrangement. Gunner's station in right foreground, commander's station to his rear, driver's rotating capsule partially obscured in left side of turret
MBT-70 prototype test firing an MGM-51 missile
Turret weapon layout, autocannon in stowed position, barrel pointing backwards