I just picked up my first glock tonight, its a glock 23 3rd gen. It says USA on the slide and the frame. I bought it new from a local guy and i didnt think anything about it till i noticed most are marked austrian. I have been doing some digging around to find out more about it but cant really get any date manufacture etc.. using a serial number lookup. the serial starts with AACV and then 3 numbers. i dont know if this thing is worth more being a us made glock or really much about it. Can someone help enlighten me on this pistol that i have no knowledge about. thank you glock gurus.