Mepro hvs fixed pistol sight features an extremely bright contrasting colored ring front sight.The tritium is illuminated green to provide low-light and nighttime aiming capabilities.The contrast in colors of the two components helps the shooter focus on the front sight quicker which is critical in defensive and competitive shooting.Rear Color: GreenFrame Color: BlackFirearm Fit: Glock 9 40Style: FixedFront Material: TritiumRear Material: TritiumFront Color: Green w/Yellow Outline