When i tried Pearce grips on my P9, it too left a small gap at the bottom of the polymer frame. It may have something to do with a difference in dimension of the poly frame versus the stainless model... but I would venture to say that, so long as the magazine seats well and functions without flaw, that it likely nomal.

I have a kahr pm9, I contacted kahr about the way the magazine fit. I was told they were designed that way. I think it's a poor design, but I sure like my pm9, no problems what so ever, so I just live with it. I guess I just compare all guns with my sigs. I think kahr should redesign their magazines, and replace the ones they sold us.