T-90 SPAA

Soviet engineers carried out some early experiments with tracked SPAAGs before and during World War II, including a modification of the T-70 light tank, resulting in the experimental T-90 SPAAG which was armed with two 12.7 mm DShKT heavy machine guns.

The program was cancelled in 1943, in favour of the ZSU-37 37 mm self-propelled anti-aircraft gun, built on an SU-76 chassis.

Image Sources
https://forum.warthunder.com/index.php?/topic/187616-soviet-spaag-suggestions/