I didn't expect too much from an optic that cost less than $100, but I picked this up for my AR9 build, and I am Extremely impressed on how well it is doing. After zeroing it in, I can pretty much drive nails with it. I haven't beat on it with a water bottle, but I have had it in and out of my truck many times, and into the side by side over rough terrain. After 150ish rounds fired its still dead on. I haven't used it on anything over 100 yds, but from 25yds up to 100 I am very impressed. The ...