Night Fision Perfect Dot Night Sights are designed to be durable and easy to use. Night Fision night sights feature a patent-pending injection molded sleeve design which holds the tritium vials securely in place. This process creates a brighter and more durable ring that is known as The Perfect Dot! Perfect Dot Night Sights provide you with maximum visibility in both day and night conditions. The precision machined all metal body features a black nitride finish.