XS R3D Tritium Suppressor Height Night Sights feature a traditional 3-dot tritium, notch and post sight picture. The rear is blacked out to increase contrast against the front sight. The front sight is available in orange or green and is equipped with Ember Glow Dot Technology. Ember 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 sights are the brightest options for fast and accurate shooting in bright and low light. FeaturesTritium Powered Front & Rear Sight -Glows in low light to aid in sight alignmentHigh-Contrast Color Front Sight - Available in bright orange or greenEmber Glow Dot - Photoluminescent dot absorb ambient light and glows in low lightRear Sight Overhang - Reduces rear sight glare in bright light for greater sight definitionAnti-Reflective Rear Tritium Lens - Reduces glare in bright light and increases contrast against the front sightRear Sigh...