HD XR Night Sights for Glock handguns from Trijicon offer the next level of advanced target identification and long-distance engagements. While some sights obscure the target, or make confirmation of hits on target hard to see, the thinner front sight post reduces these common issues. HD XR Night Sights use a U-notch rear sight design for intuitive use and quick target acquisition. Sapphire jewel capped tritium lamps Tritium-phosphor lamp Silicone rubber cushion These XD HR Night Sights are compatible with Glock handguns. Mfg: Trijicon