Quartus,
Thanks for the welcome. I should have been more specific on the BDU's. I should have said that they are more functional. Comfort being one of the nice things that goes with that.
Nightcrawler,
Unless budgets change, I don't think that you will see those type of weapons being issued enmasse. In capable and trained hands, they are very useful. That being said, many depts. cannot or will not give officers the training they should have. Most of the time, this is due to money, or they figure if they gave you a new toy, that should be enough. The training issue doesn't come up until there is a lawsuit. And, sadly enough, you are correct about the military not getting the training they should. Maybe the current administration can start to change that. Klinton did a good job of cutting the throat of those that defend our nation.
It would seem that most of this is directed at PD's. If it is a Deputy in a rural setting, his backup could be 30 minutes away in many instances. He has to survive with what he has, and there are times when a pistol or shotgun are not enough. The change in weapons is a slow but sure response to what the bad guys are using. Going up against an AR-15/M16, AK type rifle, or hunting rifles with a pistol is a losing proposition. And the officer may not have time to wait for backup. It could cost him or a citizen their life.
As has already been said, training is an important issue. I know that there are some "Rambo" types out there. But there are far more that would like to do their job, and go home to their families at the end of the shift without any extra holes in them. If you have ever been on the sharp end of the stick, it changes your perception somewhat.