Interesting article Blue. And where, like the author says, I have confidence in the optics that I place on my weapons, I see BUIS's as what they're named for. They're there for "back up". So I still place them on all of my rifles, from the shortest to the longest. To me, the $200 cost for a good set of YHM or Troy sights, is more valuable than letting a scumbag possibly take me out if the optic battery dies.