Comparing: AT 15 vs. SU-101

Assault tank conceived to break through fortified positions. The design project was ready by the fall of 1943, but no prototypes were manufactured. However, the project became the basis for the A39 Tortoise heavy assault tank.

In 1944 the Construction Bureau of the Ural Heavy Machinery Plant developed the SU-101 with the D-10S gun and the SU-102 with the D-25S gun. Both vehicles were designated as Uralmash-1. Prototypes were manufactured in April 1945. The vehicles never entered mass production nor saw service.