Chesty was harsh from what I hear, but Mattis is still around to kick your a**!
Hopefully they get new barrels to drop them even more. Not like they are subject to the NFA rules.
Kobe has a point. It's one more thing to keep track of in the woods, and keep clean in the mud. Once it gets lost, or torn up, you gotta pay the piper.
As to barrel length, we're already having trouble with engaging targets in Afghanistan. Every battlefield is different, but we don't have the budget to have multiple uppers for each infantryman. It would be cool, though. So when you talk about shortening a 14.5" barrel, you're removing more of the functionality it already sucks at.