I have a Kahr MK9 semi-auto pistol. I bought this gun new 23 years ago, I carried it everyday in my security/bodyguard duties. This gun have never malfunctioned, ever, I qualified every year with it. Myself I am not a fan of polymer frame guns, they just seem cheap to me, my MK9 is all stainless steel, so it does weigh more that the plastic framed models. and I think it is still the smallest full power 9mm out there. Anyway I was checking all my guns the other day, and I found that my MK9 had a crack on the slide, between the barrel and the recoil spring, it was just a hairline crack, but still a crack. The crack could also be seen from the inside of the slide, when removed from the frame. How long had the crack been there? I have no idea. I shot 3 PPC matches at the Taylor Police range last winter without any problems. Anyway I called Kahr, talked to Mark and told him my story, he sent me a return mail authorization and off the gun went to Kahr. Eight days later my gun was returned, with a new slide, new recoil spring, new sights, and a new ejector. Now that was extremely fast service, I can't wait to get out to the range and run some rounds through my MK9. I thought it would take a month or two to get my gun back. Dennis