Robar put 24/7 Big Dots on my P45 and I fell in love with the sights. Finally got around to installing them on the G27 and G36 last week. Super easy install and better if doing two at a time. CCR is putting them on my G23 while it's being refinished and after that I think I'm done installing new sights for a bit. Makes me wish I didn't go for the factory NS on the G21. Funny thing, my camera doesn't take very good pictures in the dark.