HiViz Adjustable Fiber Optic/Litepipe Rear Sight Ruger Mark I Ruger Mark II Ruger Mark III Ruger Mark IV Ruger 22/45 Black. Our bright and fully adjustable rear sight will enhance your confidence and shooting experience.Features:Interchangeable LitePipe design Includes green red and black Litepipes All steel construction LitePipe diameter 0.070 Windage and elevation click adjustment Limited lifetime warranty under normal conditions and proper use of firearm Fits Ruger Mark I II III and IV pistols; 22/45 with adjustable rear sight including the 22/45 LITE. Specifications for HiViz Ruger Adjustable Fiber Optic/Litepipe Rear Sight: Manufacturer: HiViz Gun Model: Ruger Mark I Ruger Mark IV Ruger 22/45 Ruger Mark III Ruger Mark II Color: Black Fabric/Material: Steel Illumination Type: Fiber Optics Illumination Color: Green Included Accessories: 3 sets of LitePipes in Green Red and Black. Features of HiViz Ruger Adjustable Fiber Optic/Litepipe Rear Sight Fits: Ruger Mark I II III and IV pistols. Also fits: Ruger 22/45 with adjustable rear sight including 22/45 LITE. All steel construction with click adjustment for windage and elevation. Interchangeable LitePipes. Includes 3 sets of LitePipes in Green Red and Black. Package Contents: HiViz Ruger Adjustable Fiber Optic/Litepipe Rear Sight Includes 3 sets of LitePipes in Green Red and Black. What firearm models does the manufacturer say HiViz Ruger Adjustable Fiber Optic/Litepipe Rear Sight is compatible with? The manufacturer says that HiViz Ruger Adjustable Fiber Optic/Litepipe Rear Sight is compatible with Ruger Mark II Ruger Mark III Ruger 22/45 Ruger Mark I Ruger Mark IVHiViz MKAD211: Adjustable Fiber Optic/Litepipe Rear Sight Ruger Mark I Ruger Mark II Ruger Mark III Ruger Mark IV Ruger 22/45 Black