I only own one of the three - PM9. Kahr states that it has a 200 round break-in period. Most on this forum would likely say that about any gun you want to carry. Mine was been flawless through 300 rounds of various FMJ and self-defense rounds. It is a great shooter with a great DA trigger. I am 5'7" and 155 lbs and have carried it in my pocket since I bought it - jeans, shorts or khakis no problem. Check out kahrtalk.com for more info on the Kahr.