I have a well built AR in 556 that needs glass. I'd like to be able to shoot out to 600 yds with that rifle and have no problems identifying my target. It is a heavy rifle so I'm not concerned about weight. I have a Vortex Razor I considered putting on but that seemed like overkill and that is now going on my 6.5 I'm building. The Trijicon 4-16x50 AccuPower looks nice. Really would like to have a precision scope with their fiber optic/tritium system, that be a nice setup.