Honestly, the battery life argument falls flat for me. Is it impressive that the Aimpoint battery lasts 50,000(?) hours? Absolutely! That's amazing. But realistically, lets say you shoot your gun for 2 hours every session (range, etc). And lets say you have 1 session a week. That's 8 actual hours of on-time a month, so let's round it up to 10. That means your Eotech, with a life of 600 hours, would last you 60 months, i.e. 5 years on one battery with regular use! Even if you put it to higher use, lets say 10 hours a week, that's still 1 year of use on one commonly available and cheap battery.