Ruger sp101 xs standard dot front sight - XS Sight Systems Standard Dot Tritium

Really like the end result. XS Standard Dot fills the fixed rear sight notch perfectly (I would not use the Big Dot on this pistol), is pretty much a white dot in daylight (way better than OEM for old eyes) but glows green very nicely in darkness. Installation best performed with a drill press. YouTubers make it look easy but not so much. Have a NEW high quality 1/16" drill bit (the sight is very hard steel), keep bit short to not break it. Red Locktite included with purchase but I chose to go with blue in case I ever want to remove it. Have another on order for my wife's SP101.. final touch to trigger job, spring changes and grip upgrades. An even better SD revolver now.