Night Fision CZU078019DYGZG: The Stealth series is designed to not interfere with aiming the primary optic, but provides the shooter a top-notch tritium sight picture. The Stealth series night sights have serrations on both the front and rear sight. They feature tritium vials with an optically engineered domed lens design for superior visibility. The rear sight has a black ring around the tritium vial while the front ring is available in yellow, orange and black. The rings are made of a ballistic polymer and guaranteed to not chip, crack, fade or peel under even the most adverse conditions. Made in the USA.