Building on the features of the popular HD Night Sights, the Trijicon HD XR Night Sights are for the next level of advanced target identification and engagement at increased distances, ideal for police and competitive shooters. Trijicon HD XR Night Sights are self-luminous three-dot night sights that feature a highly visible photoluminescent paint outline, and 2X brighter domed sapphire/tritium front sight to quicken sight acquisition. The ,U, notch rear sight is angled and serrated to reduce glare and aid in front-sight focus. A thinner front sight post allows the shooter to have a larger field of view which further enhances the ability to identify targets, expedite engagements and see hits on target at longer distances. Local and federal law enforcement and pistol shooters that need the advantage of a more precise engagement in any light can count on the Trijicon HD XR Night Sights.Features :Fits GLOCK 42/43/43X/43X MOS/48/48 MOSGreen Tritium with Orange Outline Front SightGreen Tritium with Black Outline U Notch Rear Sight