[PMC]

Adding to asset Miles' comments above........I had a similar Kaboom experience with a Gen 3 G21. It was a duty weapon, and saw frequent use with at least every other day on the range.

I rotated duty ammunition in 3 to 4 month cycles and shot it accordingly. At the time I was using Federal HydroShock Duty ammunition. When the Kaboom occurred, the barrel swelled, locking up the slide, while the main force of the detonation blew straight down, blowing out the magazine well, the trigger, and magazine release as well. I had a relatively lengthy shift followed by advanced training class that weekend. In the chaos, I did not get photos. Upon contacting Glock, a new LE pkg G21 with night sights and 3 hi-capacity magazines was shipped to me overnight, along with return postage for the Kaboom model.

A few weeks later, a Glock technician contacted me to inform me it was not the firearm, but rather ammunition which somehow caused the detonation. The polymer frame aided in absorbing the blast, however, brass shards were fragmented into my hand, and cheeks. I had the shrapnel removed a couple of days later, after my training class was completed.