What is the most effective assault rifle?

"Kalashnikov AK-47 AKM Assault Rifle" Is the most effective assault rifle yet invented, of course, there are many versions of this rifle, but it is powerful, cheap, deadly, and pretty much accurate on an assault-range.

^^^ Wrong.... wrong on so many levels. The AK47 and AKM are two different rifles. The AKM is an improved version. And its main weakness is that it fires that terrible 7.62 round... The AK74 is a completely superior gun. More accurate, better ballistics with the 5.45 round, less recoil, lighter etc.