some points that i would like to make about the above video.
1) i don't know what kinda ak the shooter is using and/or if he has any shooting abilities at all because i have no problem hitting the 5 zone of the exact same military e-type shilloutes at 200yds, from prone supported, unsupported, and sitting. using wolf ammo.
2) i would like to have seen them use a smaller target to aim in on, as the old saying is true, aim small miss small.though the ar is more accurate and i know that, not becasue i watch videos like this or follow the chit chat on forums about it, but i have done it, i have hands on experience with both weapon systems. and as you can see from the video the ar's groupings werent that good either, they were pretty spread out, if there would have been a smaller aiming point it would have been a better indication for both the ar and the ak. yes my ar is more accuarte than my ak, but still yet a humanoid size target at 200yds is easy to hit with the ak for me.
3) i agree the sights of the ak leave alot to be desired and the ar's are far better IMHO. the circle of the rear appeture draws your eye to the center, they are faster and easier to use in my experiences.
4) as far as which chambering is better is really mission dependant. if you are in an enviornment where you need the rounds to penetrate the enemies cover then the ak is supperior, however if you are in an enviornment where you want to keep penetration to a minimum the 5.56/223 is the better choice.