[ether]

I've never seen anything like that, but thanks for the pics. I can only imagine that it was either run over by a tank or steamroller, or it was dropped from the Empire State Building. I'd be fascinated to see the slide and barrel.

But the answer to your question is, "For all intents and purposes, it's irreparable." It would cost far more to attempt to weld and repair it than it will ever be worth.

 

[ether]

Here you go.

The slide and barrel appear to be entirely serviceable. I don't know what happened to that frame, but it's a mess. Maybe it was a lemon off the assembly line with poor heat treating...no idea here.

If I were you, I'd salvage the small removable parts from the frame (which appear to have already been scavenged) and shop for another one in serviceable condition

 

[ether]

Nice idea, but I was planning on having the gun completely refinished anyway.

If that frame cracked six ways from Sunday under normal use, I can only believe that it's fundamentally flawed and beyond repair.