I wish I had found this board before I purchased the PM40. I based my purchase on the desire to have a .40 more easily concealable than the Glock 27. From the articles I read in various shooting magazines, it appeared that the PM40 would be a good purchase. I am now attempting to obtain a return authorization from Kahr for several problems I have experienced, including... The threaded end of the recoil spring guide fell off after 60 or so rounds. After spending about two hours on my hands and knees at the range I somehow found it and put it back on the quide, using the Loctite that should have been applied at the factory, IMO. I experienced numerous failures to feed, even using 180 grain FMJ ammo. When I switched to Winchester JHP, the failure rate increased and I had three misfires. Even though the striker fell, there was absolutely no indentation on the primer on two rounds and a very light strike on the third. I think the firing pin block is allowing the striker to fall, even though the slide is not full closed. If that is the case, I believe this is a very dangerous condition. I could see and hear the slide slowly "kerchunking" into place at times. I experienced several "stove pipe" failures in which the spent casings were mangled and jammed in the breech. When using the extended magazine, the slide will not lock back after the final round. When using the shorter magazine, the final round consistently fails to feed. When cycling the slide slowly by hand, I noticed that the slide binds or catches on the end of the recoil spring guide. IMO, the guide is moving around too much. I was determined to get 200 rounds through it to see if the situation improved, but after trying three different brands of commercial JHP ammo in addition to my handloaded FMJ, I came to the conclusion that these were either basic design or quality control issues that have little to do with break-in. As I approached 200 rounds, the failures seemed to become more frequent. On the bright side, accuracy at 15 yards was surprisingly good for such a small pistol. I've purchased a couple dozen pistols over the years, both production models and custom pieces. This is without a doubt the most problem plagued pistol out of the box I have ever seen. After searching through the threads here, I have read that Kahr's customer service is good. I have also read of numerous trips back to the factory to get them running and the company or owners finally giving up. I don't need this aggravation. I needed a reliable CCW pistol. Right now, I would have to advise anyone considering a PM40 to reconsider. I apologize for my first post here being a rant of sorts, but if I had access to the information I have seen here, I would have gone elsewhere for a .40 CCW pistol. Hopefully I can help someone else. I will report back in to see how or if Kahr handles the situation. I'll give them a fair shake here if they take care of me and let you know.