Aimpoint PRO vs ACO?

[electronman1729]

Thoughts and opinions on the PRO vs ACO?

[The Rat]

The ACO has reduced battery life and an absolute cowitness mount. I see no reason to go for it when you can pull a PRO or something even better used. (I got an Aimpoint M4 for $399 last month. Prices on the used market are pretty good as long as you keep an eye out.)