I myself had an ACOG, but found it very difficult to bring it on target in CQB fights. I switched to the M68, which I found requires less thinking on my part. I can shoot it like it is intended to, with both eyes open. I don't like the battery part, but I don't have a problem receiving them through supply channels. Aimpoint changed their circuitry and according to their website the new M68 lasts 8 years on a single battery. Sounds like a stretch, but the Army would love to switch to these considering the amount of money they spend in batteries in any given fiscal year.