I have used Tasco PDP2 and AccuDot red dot's and Millet variable red dots on my bullseye pistols for quite a number of years. Without them I would have had to quit any form of competition. I tried an early Burris Fast Fire, but it was not user variable and got Too bright in the daylight, and with my eyesight "starred" out so bad I couldn't see the target center. I am anxious to try the new Fast Fire III which is user variable. All my rifles have scopes on them.