Best Bang for the Buck in RedDot sights - Aimpoint CS only available From Midway - (just a midway customer) Aimpoint CS Red Dot Sight 26mm Tube 1x 2 MOA Dot with Integrated Picatinny-Style Mount Matte - MidwayUSA I just got mine about 2 weeks ago. Holds zero perfect - Built like a tank. I had held off for a long time moving to a High Tech sight - I guess that it is years of working in the Hi-Tech field - that has kept me old school - it takes a lot for Iron sights not to work when you need them. I have seen to much high tech equipment - have issues - dead batteries, switches that you have to turn on etc, In a Life or death situation - I want something that is grab and go, why add one extra step to slow you down. I was sold when I saw the Integrated BUIS. I had chewed on the Trijicon Reflex Sight and the Meprolight reflex and the other self-powered sights. The CS is also always on; I leave it on about the 12th or 13th position with 80,000+ hour battery life - this was important for Home defense or in Grab-n-go for CQB. The front flip up sight is waterproof and dust proof, but is not transparent - (I found that it did'nt matter - The open eye co-witness - paper plates at 25 yards with the flip up cover closed -reassured me that it did'nt matter open or closed ( you still get the red dot and it is superimposed when your using two-eyes). This is first a Close Combat Optic sight and a extended range second. The other issue that had stopped me is that your investment did'nt stop with just the Sight, it was all the extras that added up quickly. i.e. $26 rubber cover, $36 Kill Flash, $17 See through rear cover, $54 Flip up Front cover, $94 Twist mount. The CS comes with all these standard - One thing would have made it perfect would have been a user replaceable AA battery. I am ready to buy one more.