The tritiumGreen Dot SightSystem for XD Sub Comp. Adjustable Set of Tru-Dot sights, offers the bestlow lightperformance of anynight sights. Day and night, the shooters aiming reference is three self-illuminated dots, identical in appearance and location under all light conditions. Get the Meprolight advantage with the brightest night sights available today. Meprolight sights are used and trusted by military personnel and law enforcement officials. All Meprolight Tru-Dot sights are covered by a 12 years usable illumination warranty to original purchaser.