It works great - Leapers UTG Red 4 MOA Micro Dot Reflex Sight w/Adaptive Base

I installed it on one of my ar15 rifles and it works great. It was easy to install on my rifle and came with all the tools needed to install and zero in, and it was very easy to zero in, just a couple of clicks. This site also came with an extra battery. My only disappointment was the free shipping, I live six hours south of Chicago but it took 6 days to get here. And since I live in Illinois I had to pay the Chicago Illinois sales tax which isn't cheap.
Buy this site and you won't be disappointed .