I had Kill Flash in my Aimpoints and they about drove me crazy. Have you ever used one? If your really worried about "flash", you can just use the sight with the front cap closed. Works just like the original OEG's.
If you've ever used the old Armson OEG dot sights, you would understand the concept. Those sights required you to shoot with both eyes open(like you should with the Aimpoint type sights anyway). The sight itself was just a dot on a black field that you cant see through. With both eyes open, the brain superimposes the dot onto the target and the bullet goes where you put it. The Aimpoints with the front cap closed work the same way. I do it all the time with mine, with no loss of accuracy. If you have one, give it a try. The kill flashes where driving me crazy with that honeycomb. It's much better without it. I remembered my old OEG and gave it a try, and sure enough, it worked. I usually do shoot with the cap open, but if I were ever to feel the need to worry about "flash", I know all I have to do is close the front cover. This also stops the dot from being visible from the front too, especially at night. And yes, before y'all start jumping up and down, you can see the dot from the front. If you doubt it, try that too.