My gaming slide carries the Warren comp rear (plain black) and a FO front. When I decided I liked that sight picture, I tried a few diffent set-ups before going with the Ameriglo Pro Operators. The sight picture is just as quick to aquire in the daylight with the white outline on the front bead and none on the rear, and also deadly in low-light with 3 nicely visible dots.
The Ameriglo rear doesn't have a set screw, but it fits really tight. I also added a drop of threadlocker on the sides for good measure, but I'm sure they wouldn't have moved anyway.
"The government cannot give to anybody anything that the government does not first take from somebody else."