Comparing: Centurion Action X vs. Object 430

The Action X turret was planned to be used for later variants of the Centurion tank. One prototype of the turret was mounted on the chassis of the Centurion Mark 7, and another was used for ballistic trials. The vehicles with the Action X turret never entered mass production or saw service.

A prototype of this medium tank was developed from 1953 through 1957 to replace the T-54. Soviet authorities wanted a tank with greater nuclear survivability and firepower, so in 1961 the project was discontinued in favor of the Object 432. Several prototypes of the vehicle were manufactured.