Finally paid off the layaway. Now I gotta get to the range sometime and see how it shoots. The fired cartridge test date is November 2007 - is that also the date of manufacture for the gun itself?

Finally paid off the layaway. Now I gotta get to the range sometime and see how it shoots. The fired cartridge test date is November 2007 - is that also the date of manufacture for the gun itself?

There is a relationship between date of manufacture and the date on the test fired cartridge envelope. You can check yours against others in the glock talk database:
Congratulations on your new addition.
I have an G21SF and really like it.
Congratulations! I just love that new gun smell.
I’m on my 2nd 21. This one is a SF. My favorite 2 Glocks are the 21 and the 30. I have all the 9’s and .40 models but I love the .45 and Glock’s work for me.
CONGRATULATIONS! Have fun.