I don't really think the ACOG and Aimpoint are really equivlent sights. The Aimpoint is faster and eye relief is non critical so it's better for quick aquisition and close range shooting. The ACOG has magnification is it's better for longer distance shooting. The ACOG doesn't need batteries, but the new ML2's and M2's with their batteries seemly lasting forever, like I said, I leave mine half way to the highest setting and it's going on 11 months now and it's still just as bright was when I got it, it's kinda a moot point when people with ACOGs say it's better because you don't need batteries. You can probably get 10 Aimpoint batteries for $50 tops and that should last a lifetime. I belive if you need the tritium changed in an ACOG, it's much more expensive. On the other hand, if I wanted an optic to shoot past 100 yards instead of home defense, I'd probably get an ACOG. I just don't think when people say that the ACOG is 10 times better because it doesn't take batteries is really that accurate of a statment.