XS Sights R3D, 2.0 Night Sight, For HK VP9 Optics Ready Suppressor Height, Green Front Outline, Green Glow Front/Rear HK-R202P-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 glow photoluminescent front sight. R3D sights are the brightest notch and post option for fast and accurate shooting in bright and low light. Fits VP9 Optics Ready. Glow lamp in front and rear sight glows in low light/no light. High-contrast colored front sight. Glow Dot absorbs ambient light and glows in low light. Serrated rear sight to reduce glare. BlackNitride finish for wear and corrosion resistance. Black PVC rings to enhance glow in rear sight. Anti-reflective rear glow lens. Rear sight ledge for one-handed slide manipulations. Durable CNC machined steel. Fits standard holster options. 415 tall, rear sight. Sights will not co-witness with all optics, measure to ensure your sights, plate, and optic are compatiable. Manufacturing defects vary by individual Brands. We will give instructions as what is to be done on a case by case basis.