Earlier I posted a thread asking for your help to decide between a Generation 3 Glock 19, Glock 23 or Glock 21. My primary usages will be home offense and as a car weapon in areas where this is allowable. Should I decide to get my Concealed Carry License, I will hold to the axiom of a famous combat handgun instructor who advises us that a handgun is to be COMFORTING and not comfortable. I already have a Sig 2022 .40 that is a little smaller than the G22 platform. I am taking this time to thank all of you for your input. I have been searching, researching and handling all manner of makes, models and configurations and I find the Gen. 4 Glock 22 for what it is, feels fantastic in my hand------much better than the Gen. 2 Glock 22 I had a few years ago. The .40 just seems to be a no brainer for me---the guy who is not a person focused on handgunning. My passion is wingshooting but I do want a well made weapon with parts galore. The .40 seems to be a great compromise when price, power and performance are considered. With all due respect, there is a reason it has surged to be the police caliber. Are their any serial numbers I should stay away from? I am guessing I should get the latest model I can. Any insight you may have is greatly appreciated.