The HD XR Night Sights for FNH handguns from Trijicon are the solution for pistol shooters who need to maximized precision and visibility in any light condition. A thinner front sight post obscures less of the target and provides a larger field of view. HD XR Night Sights use a sapphire jewel to cap each tritium lamp to more evenly distribute the light as well as protect it from puncture or solvents. U-notch rear sight design Silicone rubber cushion Protective aluminum cylinders for the tritium lamps These XD HR Night Sights are compatible with FNH handgun models FNS, FNX, and FNP. Mfg: Trijicon