XS Sights Big Dot Orange - Shotgun Bead on Plain BarrelXS Ember Big Dot offers superior front sight visibility in all lighting conditions. Upgrade a home defense shotgun to a high contrast front sight that absorbs light and glows in less than ideal conditions. Optic Orange is designed to offer a high contrast sight picture when shooting in bright light conditions and maintain its visibility in decreasing light levels. To ensure visibility in low light when uncharged, optic orange is primarily based on