I used to think the magazine in my Kahr P-9 popping out under recoil was due to my inadvertently contacting the magazine release. But since I shot it for the first several years without that ever happening, and considering the frequency with which it's happening now, I'm beginning to think that instead something has worn out in the mag release mechanism and needs replacing. Maybe the spring. Maybe the part that fits into the magazine slot to lock it in has worn out and rounded. Don't know, but now I hardly have a range session with it when it doesn't pop out under recoil at least once, and for the first four or so thousand rounds it didn't happen even once.