Apparently the 45 GAP does the same thing as the 40 S&W. More power than a 9mm, in a smaller package than a 45 ACP. This guy has some info on the 45 GAP, and just about every other round. He's apparently a reloader, so how knows all about velocities and bullet weights and such. Also, I'm not sure if the rifle I posted a pic of is an AK variant. On the Tula museum page where I found the pic, it said that it was the main competitor of the AK. It was apparently designed by a guy named Korobov. I wouldn't be suprised if it used the basic operating system of the Kalashnikov though, like just about every other Russian rifle.