They can monkey with the M16's ammo all they want, but the moral of the story is, you cant polish a turd.
Now hold on a second, dont go nuclear yet....
For what its designed to do, the M16 is adequate. Hell, it even excels in a few areas, such as controllability and accuracy. The M16A2 is pretty damn accurate. The ergonomics are superior to the AK also.
However, its reliability is a major issue. Whether because of the gas system, or all the hard-to-clean places that crud likes to hide, the M16 is kind of a bitch to keep operational in a dusty/sandy environment. As long as you're not in the desert, it works just fine. OR, if you're going to do a lot of maintenance in the desert, AND have taught your people the right way to do so. Which the army seems to be severely lacking in. I've been to the Kuwaiti desert, and the desert of Kommiefornicate, and my SAW and M16 worked. Because I knew enough to NOT slop a ton of CLP in them. A VERY light coat is more than enough. The army needs to worry less about diversity and sensitivity training, and more about weapons training. And they also need to learn one key thing from the Corps, modify it thus, and adopt it: 'In a war, EVERY soldier is a rifleman.' Whether you're a grunt or a cook, you should be ready to engage the enemy with your rifle at any time.
BTW, I'd like some of those $10 AK's too. About a dozen ought to do it.