Since I'm in the process of sending the slide for my 1911 off to get it's sight install checked, long story, either the gunsmith took a bunch off the bottom of the rear, or I was shipped the wrong sight. Either way XS is making it right and said to ship them the parts. I decided I needed to get some tritiums for my newest carry gun, a Kahr PM9. Incase my 1911 isn't back in time for next months Low Light/Night Fire course. Found out Kahr has Mepro's for a great deal, and I like that the white outline on them is larger than the Trijicon's. So this will be my first set of these type of sights, the 1911 has Big Dots. Pics coming when they arrive.