XS Sights R3D, 2.0, Tritium Night Sight, For HK VP9, Standard Height, Green Front Outline, Green Tritium Front/Rear HK-R201P-6G Their second-generation R3D night sights are engineered to give you a brighter" stronger set of sights. Easily install their sights with a set that requires 50% less force for installation. R3D sights are built to withstand years of EDC use and abuse. The set drives focus downrange using a serrated blacked-out rear sight and a dual-illuminated tritium photoluminescent front sight. R3D sights are the brightest notch and post option for fast and accurate shooting in bright and low light. Fits VP9 OR