What model of AR-15 is over all the best for hunting and target practice, and what company manufactures it?

I want to buy the closest thing possible to an M16A4 without having to buy more parts and switch them out in my rifle. I am looking for something that is accurate, powerful, and can shoot out to medium or long range targets. I've heard that the Colt HBar is good, but I am not sure.
4 answers 4