Solid built, great quality glass & dot, reasonably priced - OpticsPlanet Exclusive Sightmark Mini Shot M-Spec FMS 3 MOA Dot Reflex Sight 1x21mm

I purchased this sight as a backup and for short-range engagement using a 45-degree offset mount. I also have astigmatism which makes the use of red dots impossible or at least impractical as a primary sight. That said, I tried Vortex, Sig Sauer, and other similarly priced micro dots, and was surprised to find that the Sightmark Mini Shot M-Spec FMS Reflex Sight proved to be completely usable for my eyes. True, the dot is not crystal clear and a tiny bit fuzzy because of my astigmatism, but it nonetheless it is a dot. All other brands I tried appeared to me like large starbursts and were therefore unusable. Additionally, I like the protective steel cage around the sight glass. It’s very similar to the shield of EOTech sights. None of the other sights I tried out had this additional protective feature. Overall, I am very pleased and have already ordered another one to serve the same purpose, which is as secondary sight as well as for close-range. Great product!