You’re right...it is an SU body. I should have caught that instead of saying an IS. My coffee hasn’t kicked in yet. lol
I’m really surprised they’ve still got that old stuff in service. But then again, we’re still using B 52s.
SU-100s will probably live forever, in some capacity. Wouldn’t take much to make a Jagdpanzer Rakete out of it with an armored box launcher with Kornets or something.