Burris
I have the Trijicon RMR (FN Tactical) and the J-Point mounted on pistols. I was torn between the Burris and the J-Point for a S&W M&P C.O.R.E.. I finally decided on the J-Point due to size and weight (it's the smallest available I believe). Both are remarkable in how much they transform the usefulness of a handgun. They are the solution for aging eyes.