The SIG XRAY rear sight characteristics tritium inserts on possibly facet in the notch, but no coloured outlines to attract your notice from the ever-important front sight. Modern-day/night time sights have tritium inserts in the rear sight, on possibly side of the notch, but it's a basic, black rear sight. https://sig-sauer-p220-cost20087.post-blogs.com/48425786/a-secret-weapon-for-sig-sauer-p220-cost