TRIJICON HD XR NS FOR GLK 9/40 ORG T: Building on the features of the current HD™ Night Sights” the Trijicon HD XR™ night sights are for the next level of advanced target identification and engagement at increased distances. A thinner front sight post allows shooters to have a larger field of view which further enhances the ability to identify targets” expedite engagements and see location of hits on target at longer distances.