Fast forward to today; I ended up sending the PM40 back to Greeley, PA with what was happening. I put a new RSA in it and started to get early slide locking on a loaded magazine. Anyhow, they figured it out and fixed it. I just received an email that the gun is in FedEx's possession and will be here soon. As stated earlier, I am not the original owner, they paid for FedEx both ways and I have no bill! In my opinion this is outstanding customer service. This is why I appreciate the Kahr line of pistols. I have never had any big issues with any of the Kahr pistols that I own, this one was perplexing as it is a .40S&W and I do think that the original RSA was weak as it was about 1/8" shorter in OAL that the replacement RSA which is an old style with the 3/8" plunger. I look forward to getting it back at the range again.