HIVIZ LITEWAVE Interchangeable Front Sight for Ruger MK II and Ruger MK III -Does not fit 22/45 Lite model. Will fit Ruger single six revolvers with adjustable rear sights. (replaces HRB2007) Also fits Browning buck mark pistols (except challenge, Buckmark 5.5 target, and Buckmark 5.5 field). Includes three litepipes in red, green and whiteLitepipes store in litepipe changing keyDoes not fit 22/45 Lite modelWill fit Ruger single six revolvers with adjustable rear sightsAlso fits Browning buck mark pistols (except challenge, Buckmark 5.5 target, and Buckmark 5.5 field)