[Dr. Deleto]

considering that the 5.56 nato round was designed to wound and not kill, and the 7.62 was meant to destroy the target, I'm going with AK47. Also, The 5.56 tumbles as it exits the barrel making it less accurate, where as the 7.62 is set on a flat spin. As I recall the AK fires just a bit faster than both of them as well (cant remember exactly). The AK is what, 40 years old? and it really hasnt changed much in that time. Yet it is still one of the best designed and most versatile weapons in the world. Damn Soviet engineers!