“The ISU-122 (Istrebitelnaja* Samokhodnaya Ustanovka 122) was a Soviet assault gun used during World War II, mostly in the anti-tank role.” 
“Much like its older brother, the ISU-152, the ISU-122 saw action as a multi-role vehicle, but it was used as a tank destroyer more than the ISU-152 because its 122 mm gun was much more accurate than the 152 mm ML-20S howitzer.” 
* Iosif Stalin-based
Based on the Tamiya 1/35 kit .
This model build has a complicated history. Originally I was going to do the Zvezda ISU-122 model. However, in the end I decided it was just too basic for my wants. Next, it was to be the Dragon ISU-122 model. Now, I got quite far in this build and, one day, I might still complete it. But, still, it proved tricky in a few areas and slowly (too slowly) it dawned on me that by far the best ISU model currently available is by Tamiya. I’d already built this one – and may do again one day – so I knew this could be relied upon. So, swapping the 152mm gun for the Aber 122 mm A-19 metal barrel (#35L208) and utilising bits of the Eduard ISU-122/152 photoetch set (#35713) I was hopeful that I could achieve this conversion.