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 ORFeatures :Tritium front and rear with high contrast glow dotPhotoluminescent glow dot absorbs ambient light and glows in low lightWide notch rear with serrations and anti-reflective lensCorrosion resistant Black Nitride surface finishTraditional 3-dot tritium, notch and post, sight pictureProudly manufactured in Fort Worth, TX