HIVIZ Fiber Optic Rear Sight for Ruger MK I-IV - Green, Red, White Options

The Hi-Viz fiber optic rear sight for Ruger MK I-IV pistols upgrades your .22 pistol with a bright, quick-acquiring sight picture. Whether you're running a full-size Mark series or a compact 22/45 platform—including the 22/45 LITE—this adjustable rear sight gives you the aiming advantage of glowing LitePipe technology in the field or at the range. The interchangeable fiber optic design means you can dial in green, red, or white depending on your lighting conditions and personal preference, so one sight handles any shooting scenario your day throws at you.

Built from all-steel construction, this is a tough, reliable upgrade that's engineered to last. The windage and elevation click adjustment lets you zero your pistol precisely, and the bright fiber optic pipe gathers ambient light naturally—no batteries required. It's the kind of sight that makes a measurable difference in speed and confidence, especially in lower-light conditions where a standard notch sight fades into the background.

Drop-in compatible with Ruger Mark I, II, III, and IV pistols fitted with an adjustable rear sight, this is a straightforward, effective mod for anyone looking to improve their .22 pistol's practical performance without complexity or guesswork.

Key Features

• Interchangeable LitePipe design—swap green, red, or white fiber optic inserts to match your lighting and preference
• All-steel construction for durability and reliable long-term use
• Windage and elevation click adjustment for precise zeroing
• Bright fiber optic technology requires no batteries—gathers natural light automatically
• Fits Ruger Mark I, II, III, and IV pistols with adjustable rear sight, including 22/45 and 22/45 LITE models

Specifications

Frequently Asked Questions

Which Ruger .22 pistols does this sight fit?

This Hi-Viz rear sight is compatible with Ruger Mark I, II, III, and IV pistols, as well as 22/45 and 22/45 LITE models—provided they have an adjustable rear sight slot. Check your pistol's specifications before ordering.

Can I change the fiber optic color?

Yes. The sight features an interchangeable LitePipe design, so you can swap between the included green, red, and white fiber optic inserts depending on lighting conditions and your preference.

Does this sight require batteries?

No. The fiber optic design gathers ambient light naturally, so there are no batteries to install, maintain, or replace.

How do I zero this sight?

The rear sight features windage and elevation click adjustment, allowing you to dial your pistol in precisely at your preferred distance. Refer to your Ruger manual for zeroing procedures specific to your model.