The best handgun sight on the market today, the Truglo Tritium/Fiber Brite Site Handgun Sight - Novak 1911 .260/.500 Front/Rear Green features durable CNC-machined metal construction. It transitions seamlessly through any and all light conditions, as the fiber optics sight will clearly spot your target, without your target being able to see your sight. It is made with a snag-resistant design that will fit most standard holsters. No batteries are required for this one-of-kind handgun sight that glows in the dark. Novak LoMount cut .260 Front /.500 Rear (1911 3? Officers & 4.25? Commander .45ACP). Novak LoMount cut replacement sights are designed for 1911-style handguns with existing fixed Novak LoMount dovetail cut slides, however some fitting may be required. Installation by a competent gunsmith is recommended.