Fore-grips
I find that a fore-grip helps a lot in controlling the business end, especially in CQB. I also like to have mine as far forward on the rail as possible, but more for balance than control. I use my gun for work, and every other guy I work with has a foregrip on his rifle as well. I prefer the Tango-down grip to the Knights, because to me the Knights grip just feels way to flimsy, and the TD grip has the added benefit of a slot for a pressure switch for a light/laser.
What's funny is that on my personal ARs, I don't use a foregrip. For fun shooting, I prefer plain old-fashioned plastic stocks, and a hunting-style stance, as opposed to the "gunfighter stance." If I get into competitive shooting, I will definitely put a rail & grip on whatever gun I use, but for now, I won't.
Even the CF seems to have realized the beneifts of the grip, with the folding cadex POS grip they issue out. So I guess it's official, the slowest horse has crossed the finish line.
Cheers.
Tim