The shortcommings of even the orginal AK-47 are marginal to the improvements that more recent rifles may posses. These differences are so small that their actual influence to battlefield operations is minimal. The plain and simple fact is that all Kalashnikoviks are simple and most importantly realible from the outset where as its western competitors aren't. So what if M16 is slighty lighter and have less recoil and thus marginally shaper? You can hit a mansize targets with AK in 300 meters and thats all you need. Ranges above that are usually very rare outculding deserts. Thats why you have sniper-rifles. More important is that your gun works and you can thrust it in all conditions. I can thrust AKs, so what if it weights few grams less than M16, thrust me no matter how light is the gun, carrying it around in the woods and it will weight a ton