Hi, all. I normally lurk but just have to weigh in.
Can you try and find out what ammo the Glock kB!ed on? The reason I ask is that this same thing happened to me a few years ago. I was shooting my G23 with factory ammo- in this case Federal Hydra-Shok 180 gr. The case head separated catastrophically, starting at the feed ramp. The mag blew out and the extractor blew off. I got minor powder burns on my trigger finger and looked like a glitter factory blew up on my hands and face from the brass shavings. Called Glock, they said call Federal and see if they will help out but, since it was being used for Law Enforcement purposes, they would fix it free, regardless.
Called Federal and described the kB!, they told me that they had some bad cases several years before and they had recalled the ammo. Bottom line, Federal got with Glock and fixed the gun.
Another Officer had a kB! with a G23 about a year ago, again with factory ammo, this time Winchester WB 180gr JHP. In this case, bullet setback is suspected since the Officer admitted he constantly chambered and ejected the same two rounds in the top of the mag when clearing the weapon at home, then loading up to come to work. Again, blew the mag out, blew off the extractor and again Glock fixed for free.
Again, just curious to see if you can find out what ammo was used. Thanks.
Bub