why are you so dead set on an ACOG? have you actually handled an AR with one on it?
it feels like it almost doubles the weight of my rifle. heck, you could buy 2 Aimpoint ML2's or ML3's for the price of one ACOG. and at 30,000 hours of battery life, who really needs the fiberoptic?
besides, the tritium WILL wear out! (it may take a few years but, it will go)
i dropped $1000 on my ACOG and wish i wouldve known about the Aimpoints then!
i hate to sound like i am knocking the ACOG, it is a wonderful scope. it's just that it is HEAVY and wipes out any kind of balance when mounted on an AR. also, the eye relief is only like 1.5" so you're way up close and personal with it.