I experienced a KB in my 1911... it was due to 2 factors, first I didn't know what I was doing reloading lead SWC loads and 2 a not fully supported chamber.
The rounds were loaded too long, the gun didn't quite lock up, but was still able to fire, the result was the a thin part of the case was exposed and unsupported, the gasses blew out the mag innards and cracked my wooden grips in half... replaced the mag and grips, and the gun is fine.... Wouldn't have wanted the same thing to happen with a glock....
Clearly the pics are NOT a KB from an unsupported chamber... I would suspect a barrel obstruction. and in this case, I think any gun would experience a KB and some serious damage....