The Williams Adjustable FireSight Setcollects surrounding light rays to offer you superb visibility, even in dark conditions. This firesight set features bright green fiber optic dots on the rear sight and a bright red fiber optic front dot that will give you a crisp, clear sight picture. These replacement sights will help speed up your target acquisition and improve your accuracy. - Fits Browning Buckmark [Rear sight length less than one inch. Excludes Target, 5.5 Field and Target, Challenge and Commemorative models, Hunter and Contour 5.5] - Click adjustment design for windage and elevation adjustment - High visibility fiber optics for target shooting and hunting - Improved visibility in low light conditions - CNC machined out of high grade aluminum