The IS-2Sh (IS-M) was a project for the significant modification of the IS-2 proposed by N. F. Shashmurin at Kirov Factory No. 100 in early 1944. The design featured a long-barrel 122 mm gun and a rear placement of the fighting compartment. The project was discontinued in favor of the IS-6 (Object 252).
Time for the successive autoreloading of each shell into the magazine.
Characteristics are specified for Siege mode.
Characteristics are specified for Rapid mode.
Reload time of the first and second guns on double-barreled vehicles.
Characteristics are specified for vehicles with crews trained to 100%.