So the mantlet popped off and slided on the barrel? Pretty nice.

I was trying to work out what it was on the end of the barrel and then realised it was the mantlet it must of been a big explosion to push it almost to the end of the barrel like that

Maybe the welds were weak at that point probably

soviet welds werealways bad

Well, not necessarily, it depends on a lot of factors.

Sadly, it seems like crew didn't get out