Just got my first AR 15. A SW M&P 15 with the flip up magpul sights.
Was thinking of getting a red dot sight but then looked at the scope on my old Ruger 10/22. Don't know much at all about sights for these type guns, totally new to this. Do any of you know any red dot sights that have a reticle so you can still use it if the battery dies? Maybe with some magnification? Or a very short scope with 3-4x magnification? Quick target acquisition, versatility, and cheap.