While Katyusha rocket artillery was typically seen mounted on truck chassis, there was also a variant on a tracked vehicle: the BM-8-24, which used the chassis of T-40 and T-60 light tanks as platform. Crewed by 2, it was fitted with a 24-rail rocket projector, and fired 82mm rockets. More than 600 of these vehicles were produced.
BM-8-24 Self-Propelled Rocket Launcher (35234). Kit highlights:
Sprue images may be seen at: http://miniart-models.com/products/35234-bm-8-24-self-propelled-rocket-launcher/