I found this over at End the War on Freedom. It's a rather thoughtful look at the M-16 platform of weapons over at MadOgre.com. Here's a few choice selections:
"The AR can jam so easily, and it doesn’t even make a good club."
& perhaps my favorite:
"The best way to improve the AR-15 is to unscrew the front sight, and put a new gun under it."
Go read the whole thing for yourself.