I could use some help choosing rails to put on my midlength rra ar-15. I've been looking at free floating and non-ff all brands, and could use some input from someone who has used them. I've looked at everything from the UTG drop in; as it got some decent reviews on CTD's website to Troy's drop in rails for the non-free float. Then on the free floating side, I've looked at the Daniel defense Omega rail and the Larue 9.0. Any opinions from those who have used and possibly abused them? Any help is appreciated. Price range that I'm looking at is 0-300 bucks.