When it comes to tritium gun sights, aluminum sleeves and painted-on white rings are the norm. Night Fision breaks the mold. Our patent-pending injection molded sleeve design not only holds our tritium vials securely in place, it creates a brighter and more durable ring, we call The Perfect Dot(TM), that provides maximum visibility both day and night. Pick Sight Style, Sight Model Group, Front Ring Color, and Rear Ring Color. Canik Mo