my personal pref is for semi-auto ar15 is rock river arms. i do have a colt AR SP1 (most excellent rifle) and my wife's dpms panther. if your running full auto definately colt parts, but semi auto it doesnt make that much sense to pay out the butt for high priced ar15's you will prolly never stress to that degree.
im a huge fan of colt but i think dollars in the ar market are better spent elsewhere.
just my opinion.
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith
The problem with being stupid is you cannot simply decide to stop doing dumb things...
"I crapped my pants to avoid the draft!!" -Ted Nugent