Picked up an EOTech today for my AR. It's the 511 model, as the 512 was just too big. It replaced a cheaper red dot that will serve on one of my AKs for now. I dig it, and with back-up irons it was a breeze to sight in. The AR ended up being too reliable and accurate to be regulated to a range toy, and if I was going to think of it as a viable social rifle, it needed decent optics.