I have a 1991a1 GM and have been considering a reflex sight. It is my daily carry so it would need to be reasonably small and mount on the slide. I have looked at Leupold Delta Point, Trijicon RMR, and Burris Fastfire. Cash is tight enough I shouldn't be spending money to replace perfectly functional iron but you know how that goes. I've seen some real slick installations inlet into the slide that would permit iron sight backup through the lens but that's for later. I'd also like to try it out on my 336 and 870 to see if that's something I'd want to make permanent. Does anyone have more than one of these sights on sidearms that could give me their impressions and maybe photos? I looked at the Docter but that's pushing the limit for concealed carry. Any other recommendations would be appreciated.