The HiViz Adjustable Fiber Optic Rear Sight (brand part number MKAD211) replaces the factory rear sight on a Ruger Mark I, II, III, or IV with a fully adjustable, all-steel sight built to boost confidence on the range. HiViz uses interchangeable fiber-optic LitePipes in a bright green so the shooter locks onto the rear notch faster in changing light, and the 0.070-inch LitePipe diameter keeps the dot crisp rather than washed out. Click-adjustable windage and elevation let a shooter dial in a precise zero without drifting the sight by hand, and because the sight is machined from steel rather than a lighter alloy, it holds that zero through repeated use. The rear sight itself measures 0.875 inches long, 0.650 inches wide, and 0.387 inches tall, keeping a low, snag-free profile on the receiver.

Key Specifications

• Built to fit the Ruger Mark I, II, III, and IV.
• Machined from all-steel construction for a zero that holds.
• Uses interchangeable fiber-optic LitePipes in green.
• LitePipe measures 0.070 inches in diameter for a crisp, bright dot.
• Offers click-adjustable windage for precise zeroing.
• Offers click-adjustable elevation for precise zeroing.
• Measures 0.875 in. long across the sight body.
• Measures 0.650 in. wide.
• Stands 0.387 in. tall on the receiver.

Frequently Asked Questions

What pistols does this fit? The Ruger Mark I, II, III, and IV.

Can I adjust the zero? Yes, it offers click-adjustable windage and elevation.

Buy the HiViz Adjustable Fiber Optic Rear Sight – Ruger Mark I/II/III/IV, Green

Dial in a precise, repeatable zero on your Ruger rimfire pistol. Order it from our Hi-Viz lineup, part of our gun sights selection, from our Lubbock, Texas gun shop as soon as it’s available to ship.