Williams Blackpowder Front/Rear Sights For Knight Md: 66369, The Williams sight uses a small diameter fiber optic rod held in a steel sight base, as opposed to the many plastic bases on the market. In use, the red front bead is very visible, even against a dark background., Type: Gun Sight Material: Metal Color: Green Rear/Red Base: Aluminum, Manufacturer: WILLIAMS GUN SIGHT CO.INC, Model: 66369