Coming back on thread, the M4/M16 is more accurate than the AK, for the grunt who is trained to be a rifleman, our adversaries are definitely not trained to that level, the extra barrel length is of minor consequence, extra 150fps, which is nice. Having shot both at advanced distance and at different targets, the 7.62x39 has better penetration in urban settings, bar none, than the 5.56, in open territory, I will take the accuracy of the 5.56 on a non armored target, in either rifle, it is lethal, but blows up easy on any barrier. Inside of 200 yd the accuracy of the AK is really good and the penetration is excellent, lethality on targets not so much, but you can hit your target behind barriers better than the 5.56, and a hit is always better than a miss. I am a personal admirer of the M14, long distance capability, hard hitting, and a bitch to hump with ammo to boot, I like the idea of one per squad, with a designated marksmen to operate it, and maybe an ammo carrier to support it. If I am running in a urban setting, the M4 allows a better sighting system, aimpoints, optics etc... that allow better/faster sight alignment, the AK just the crude rear blade, front sight set up, that works and is strong, but might slow me down, compared to the M4 with optics, but if your a rifleman, won't slow you down, as you are use to not using a crutch, such as optics. 2 men, well trained on each system, as John Wayne said in Rio Bravo, I would would hate to live on the difference.