Is finding the date of mfg. of your Glock even possible without contacting Glock? Example Model 27- Gen 4 Glock serial#AARMXXX. This should be interesting. If one tries to decipher the info on different sites it seems just about impossible. What the heck am I missing? Besides my Glock 27 has 4 letters not 3. Can anyone give me the date of mfg. from what I posted (Gen 4 27 #AARMXXX? I really don't need the answer of,"Call Glock". Just asking for some info and if anyone knows the answer.