Glock 17 gen 4 with relatively low round count. Never an issue with the factory magazines or any of the 10/17 magazines I have. However, I have a brand new 10/33 Round Magazine that would fall out of the gun when firing it. Pulling on the magazine it seemed seated in enough that I could not pull it out. It would chamber a round correctly and then when firing it the magazine would just fall out. I tried this on another Glock 17 gen 4 and the exact same thing happened. It wouldn't happen on every round fired but at least 50% of them.
Has anyone experienced this before?
Has anyone experienced this before?