Tin Can Sailor, call Kahr and talk to them about your problem. They have one of the best customer services around. They will either send your replacement parts or have you send the firearm in to be repaired. It has to be some defect in the magazines to cause the slide stop pin to come out. All the pin does is push up the slide stop to lock the slide back after the last round is fired. I have several Kahr's and carry a PM45 daily. I've never had any magazine problems.
Thanks for the advice. I'll do that.