Laz - I too have owned and shot an AR-15 Optical Ready Carbine, but of course sold mine to a private party 10 months ago.
That rifle had an EOTECH HOLOGRAPHIC sight on it that was AMAZING. If the red dot was on the target, that is what you hit. Target acquisition and sight picture were great.
No magnification, so keep your use case in mind. But it was exactly what I wanted.
You might prefer the 4X scopes out there. All depends on your intent.
I’m suddenly limited, financially, to around 400. I’m looking at this one: What do you think?
http://www.opticsplanet.com/aimpoint-pro-patrol-rifle-optic-red-dot-riflescope-30mm.html