Development of the Object 268 was started in the summer of 1952 at the Kirov Plant, Leningrad, under the supervision of Joseph Kotin. The vehicle was developed on the basis of the T-10 heavy tank. A prototype was manufactured in 1956. The vehicle passed trials, but never saw mass production.
Time for the successive autoreloading of each shell into the magazine.
The technical characteristics shown are for the Siege mode
Characteristics are specified for a vehicle with crew members trained to 100%.