Kensight DFS 1911 Defense Fixed Rear Sight Tritium insert - Night Sights - Recessed Blade Genuine 0.076" Trijicon Inserts Tritium Glow Bright with no need for batteries! Sight Body is wire-EDM machined from a Solid Billet of Chrome-Moly steel Fits 1911 Novak LoMount rear sight dovetail cut Snag-Free Combat Style Sight Body Allows One Handed Operation of Slide Includes distinctive grasping serrations on sight body