Just curious.... For those that have attended a Glock Armorer's course, you know for one thing that Glock owners need to be members in good standing in the GSSF to attend the 'Armorer's Course'. Allow me to assume if I may, that you are the owner of a Glock pistol(s), and as an Armorer's Course (AC) graduate, you probably enjoy maintaining, fixing, repairing, and replacing parts to keep "Your Glock" running! You are NOT a "commercial" armorer; someone that makes all or part of his/her annual income by being a firearm armorer. I have never met a private Glock owner and participant in a Glock Armorer's Course that did not learn something new as a result of attending the Armorer's Course; and that includes me. Lastly (with the above in mind) how do you feel about having your "Glock Certificate" having a 3-year expiration date ?? Our certificates are *not licenses; to say they are 'Certification' documents is questionable. They are simply an acknowledgement for having been: accepted to, paid for, attended, and *successfully completed the stated course. I don't know what the (AA) Course certificate states, is it more than what is listed for the (AC). What do you think?