So I bought a used HC/OD green P3AT, the serial number starts with the letters "HRU" and I've got a few questions... The rear sight notch appears to be off center in it's groove, is this normal? If this doesn't sound right I will take a picture. Is this serial number range subject to the guide rod problems that would require one of those washers? Anything else I should know about this tiny little pistol? I'm carrying winchester ranger ammo in it right now, thats what the guy who previously owned it had and he passed the almost full box on to me. Anyone try winchester rangers out of a P3AT yet?