The AT-1 tank destroyer based on the T-26 light tank was developed by the construction bureau at the Experimental Design Mechanical Department of Factory No. 185 in Leningrad from 1935 through 1936. The vehicle was designed for anti-tank warfare. Two prototypes equipped with the 76.2 mm PS-3 tank guns were built, which underwent trials by 1936. This vehicle 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%.