I'm looking into picking up either a Kahr PM9 or a Smith & Wesson M&P 340 for a pocket gun and am looking to find out the expected durability for each respective firearm. I've found that I can shoot the Airlight J-frames without any pain and the PM9 is very manageable as well. I was hoping to get some insight into how many rounds each is able to withstand in its lifetime. The M&P 340 would be shot mainly with .38 special with occasional bouts of .38 +P or .357 Magnum and the PM9 wouldn't see too many +P rounds either. Any help would be appreciated.