Night Fision Precision Tritium is the leading manufacturer and engineering firm of Tritium illuminated products. The Perfect Dot® Tritium Night Sights are the world's brightest gun sights, both day and night, through the use of 30% more tritium than leading competitors and its patent-pending Perfect Dot® ring for a bright & brilliant daytime sight picture. New this year are the industry's first tritium illuminated AR-15 safety selector switches, The Night Switch™, and AR-15 Perfect Dot® tritium post front sights. (less)