I am trying to figure out which optics to get for my Bushmaster AR-15. Trying to decide between the Burris AR 332 and the Nikon M-223 2-8x32mm. I will be shooting anywhere from 50 to 500 yards and just want to make sure I purchase the right one. So I will really appreciate all of your opinions from owners/users of either of the scopes to help me make my decision.