Comparing: Centurion Action X vs. M48A1 Patton

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.

The most successful American medium tank in the immediate post-war period. Development started in 1950. In April 1953, the vehicle entered service. A total of 11,703 vehicles of different variants were produced from 1952 through 1959.