Hiviz Ruger MK II/MKIII Frnt Sght MKII/MKIII. Also fits: Ruger 22/45 with adjustable rear sight (does not fit the 22/45 LITE); Ruger Single-Six revolvers with adjustable rear sight; Browning Buck Mark pistols (does not fit the Challenge 5.5 Target and 5.5 Field). Includes six LitePipes in Green Red and White. Specifications for Hiviz HRB2007 Ruger MK II/MKIII Frnt Sght MKII/MKIII: Mfg Item Num: HRB2007 Supplier SKU: 76791 Category: GUN SIGHTS Type: Sight Material: Steel Color: Black Firearm Type: MKII/MKIII and Buckmark Fiber Optic Color: Green/Red The Hiviz HRB2007 Ruger MK II/MKIII Frnt Sght MKII/MKIII is a quality addition to the HiViz lineup. For more great deals on Fiber Optic Pistol Sights by HiViz please browse our HiViz Gun Parts page. What firearm models does the manufacturer say HiViz HRB2007 Ruger MK II/MKIII Frnt Sght MKII/MKIII is compatible with? The manufacturer says that HiViz HRB2007 Ruger MK II/MKIII Frnt Sght MKII/MKIII is compatible with Ruger Mark II Ruger Mark III Browning Buck MarkHIVIZ interchangeable Front Sight for Ruger Mark I II III and IV steel bull barrel pistols. Also fits: Ruger 22/45 with adjustable rear sight (does not fit the 22/45 LITE); Ruger Single-Six revolvers with adjustable rear sight; Browning Buck Mark pistols (does not fit the Challenge 5.5 Target and 5.5 Field). Includes six LitePipes in Green Red and White.