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 designed for the next level of advanced target identification and engagement at greater distances. A thinner front sight post provides shooters with a larger field of view, which further improves target recognition, speeds up engagements, and allows better visibility of hits at longer ranges.