Trijiconc 600663 Bright & Tough 3-Dot BLK Outline/GRN Front/YLW Rear Night Sight Suppressor Set for Standard Frame Glock ModelsTrijicon Bright & ToughNight Sights are three-dot iron sights that increase night-fire shooting accuracy by as much as five times over conventional sights. Equally impressive, they do so with the same speed as instinctive shooting - and without the need for batteries. Trijicon® Suppressor/Optic Height Sights - Glock Standard Frames 600663