I just picked up a 3rd Gen Glock 30SF serial# SCHxxx with a shell collect date of 8/29/11 I think it was if that even matters. Its stock except for a set of Big Dot night sights. The trigger bar is stamped with the 4256 -1- Ok anyways my question for you Glock folks is what is the "AT" stamped on the barrel? I had heard it means it was manufactured in Austria. The frame is also stamped "Made In Austria Glock, Inc Smyrna, GA". Been a while since I kept up with Glock stuff and I saw a post about the "AT" barrel stamping but cant find it. Now I thought Glocks were manufactured or partly made in the US now. Can you tell me if mine was made in Austria, the US, or a combo of the two or any other helpful info? Im just curious. Thanks guys and gals!