Thanks for the great insight fellas, that's why I LOVE this site! I like the 511 for its weight factor...seems to be lighter than other models but I also like the multi-capabilities of the Burris, if the battery dies, you still have crosshairs to stay in the fight. I'm REALLY considering an AimPoint, I've used them on friends AR's and they perform VERY well. Just digging for some outside experience in the way of rifle optics.