XS Sights' R3D 2.0 are an upgraded version of the original R3D design. These tritium night sights feature a tritium inserts in the front and rear sight to give a clear and bright sight picture even in darker lighting conditions. The rear is blacked out to increase contrast against the front sight, and the rear sight is also serrated to reduce glare if the sun is over your shoulder. For increased contrast, the front sight is available in orange or green and is equipped with Ember Glow Dot Technology. This technology absorbs ambient light and glows in low light. The front tritium lamp charges the Ember dot making the front sight glow brighter than the rear, keeping focus down range. R3D 2.0 sights are designed to be the ultimate iron sight option for every day carry and defensive pistols.Specifications: XS Sights Item Number: SW-R205P-6G Tritium Powered Front & Rear Sight High-Contrast Green Front Sight Suppressor Height for Use with Reflex Sight or Suppressor Serrated Rear Sight to Reduce Glare Black Nitride Finish for Wear and Corrosion Resistance Black PVC Rings to Enhance Tritium in Rear Sight Rear Sight Ledge for One-Handed Slide Manipulations CNC Machined Steel ConstructionFits: Smith & Wesson M&P M2.0 Optics Ready (Full Size and Compact) 9mm/.40 S&W/.45 ACP