Comparing: Object 263 vs. FV4005 Stage II

The development of a heavy tank destroyer on the basis of the IS-7 heavy tank was started in 1950. Three design projects were developed, one of which resulted in a full-size wooden prototype. However, further development was discontinued due to phasing out the IS-7 mass-production.

This tank destroyer project was developed on the basis of the Centurion Mk3 tank in the early 1950s. The vehicle was initially tested with a mechanized ammo rack. However, the ammo rack did not fit the turret, and it was canceled. One prototype was manufactured and underwent trials, but the vehicle never entered mass production.