TANDEMKROSS Eagle Eye Fiber Optic Sight Set (Ruger Mark Series)

The TANDEMKROSS Eagle Eye Fiber Optic Sight Set is the standard iron-sight upgrade for any Ruger Mark II, III, or IV pistol with adjustable factory sights. The green fiber-optic front rod and red fiber-optic rear notch deliver dramatically faster target acquisition than the factory black-on-black post-and-notch, especially in indoor and overcast lighting where the factory blade goes dark.

The set includes a click-adjustable rear sight with windage and elevation screws and a tall sight plane that lifts the sight picture above the slide for faster pickup. The front rod is a quick-change design — user-changeable colors mean a Mark IV owner can run green-on-red, red-on-green, or matched colors without buying a new sight set. Installation is drop-in via the factory dovetail; no slide milling required.

Fitment includes both standard frame and 22/45 frame variants of the Mark II, Mark III, Mark IV, Mark III 22/45, Mark IV 22/45, Mark III 22/45 LITE, and Mark IV 22/45 LITE. Bull barrels and standard barrels with adjustable sights both work. The sight does NOT fit fixed-sight models (older budget configurations) or any pistol without factory iron sights — a red-dot-only Mark IV configuration would skip this entirely. For shooters running iron sights as primary or as backup to a Picatinny-mounted optic, this is the cheapest way to triple front-sight pickup.