One of the variants of a tank with reduced weight developed in the 1950s by the Detroit Arsenal as a part of the ASTRON program. The project was developed for operation in the event of a nuclear war. To decrease the size, all of the crew, including the driver, were located in the turret. The loading mechanism provided for magazine loading of the gun. Also, the possibility of mounting various artillery systems was considered, including the 105 mm caliber. The vehicle was reworked during the development stage, but it was never actually built.