This information is available at http://www.stakhaus.com/ where you can enter your information yourself. It also has search and sort functionality that you just can't get out of a forum posting. I recommend you update your information there. This is a database of owner supplied data. If you don't find yours listed, look in your paperwork for the little brown envelope containing two fired casings. What's the date on that envelope? Don't have it? Then please call GLOCK, US Inc. and ask them. The website was derived from years of work on the Glock Talk forum by the users MakeMineA10mm, Dandapani and GSD17. They obviously put untold hours updating the original threads and it is an amazing compilation. The purpose of this list is to be a resource for people who wonder what the "born-on" date of their GLOCK is, and to provide a historical record, which, if ever it is complete enough, can indicate some information about caliber trends, model popularity, production changes, etc. THE RULES 1. It doesn't matter if you have information that is similar to what someone else has. There is a thousand possibilities for each three letter prefix and that doesn't count suffixes. As long as you have different information than what is already existing, please add it. HOWEVER, there is no reason to have three entries for SNR*** G-17 with no generation or SNR*** with no model or BoD. 2. You can decide how much of your serial number you want posted. When entering the serial put in as much of it you would like to be shown and the system will pad the remainder with asterisks. i.e. If you enter SNR123 it will display as SNR123, but if you enter SNR1 it will display as SNR1** and if you enter SN it will display as SN****. 4. Do not use any X's unless that is part of your serial number. Do not put pound/hash marks (#) or spaces anywhere in the serial number. Any of these things will mess up the sorting and display. i.e. if your actual serial number is SNR123 these are Good Entries: SNR123 or SNR1 or SNR ...and these are Bad Entries: SNR 123 or SNRXXX or SNR### 5. If you still decide to post in this thread instead of using the website, please use the following format: SERIAL # - MODEL GENERATION - BORN ON DATE - NOTES GENERATION Here is an excellent thread by DJ Niner with pictures and description about the different generations and differentiating features. FRAMES BARREL DATES GLOCK HISTORY UPGRADES The original post had information regarding Upgrades, as GLOCK refers to them, but you may refer to them as Recalls. That information isn't directly relevant to this thread and can be found on the website posted above.