I know a lot of guys use the EOtech. So I thought I would post a problem I had with one. My 2008 512 EOteck lost it's brightness. It was only about half as bright as it should be. I called EOtech and talked to a real person! No ''PRESS 1 to talk to so and so. Or ''press 2 to talk to'' thus and such. B.S.! Just a nice, normal sounding guy. In less than 30 seconds he told me to send it back. And told me how to get an RMA on line. This morning I got my RMA via email. And was told my 512 would be fixed at no cost to me. Not bad for a seven year old optic. That only had a two year warranty. And I never registered. I just shipped it off. I will let you know how it turns out. But I like how smooth things have gone so far.