These sights provide users with outstanding brightness, and can be customized to fit the user’s needs and preferences. The fiber can be replaced by the user thanks to its threaded retainer cap, and new fibers come in green, amber, orange and red. In addition, these chemical and heat resistant fibers come equipped with a tritium lamp capped with a sapphire jewel. This dual illumination technology evenly distributes and amplifies collected light and provides a clear and highly visible aiming point in any lighting condition from broad daylight to complete darkness.