After getting a Gen 2.5 G21 from my friend, I guess I got bit by the Glock bug I went by the LGS today and grabbed a new Gen 3 G17 with night sights. I can't find a date code on the box and didn't find a test fire casing (the envelope that holds the manual, etc had already been opened). The serial number prefix is MDN. I'd appreciate it if someone could give me a ballpark date as to when this pistol might have been built. Thanks in advance!