The HIVIZ Front Sight is a factory-height, all-steel sight with interchangeable LitePipes, designed to enhance aiming visibility with improved durability. It fits Ruger MK I, II, III, and IV steel bull barrel pistols, 22/45 models with adjustable rear sights (excluding 22/45 LITE), Single-Six revolvers with adjustable rear sights, and Browning Buck Mark pistols (excluding Challenge, 5.5 Target, and 5.5 Field models).