Williams Firesights Adjustable Fiber Optic Sight Set (Ruger Mark Series)

Williams Firesights are the value fiber-optic sight set for Ruger Mark series pistols. Red front rod and two green rear rods deliver high-contrast iron-sight pickup at half the price of the TANDEMKROSS Eagle Eye, with a click-adjustable rear and aluminum housing finished in black anodize. Williams has been making rimfire fiber-optic sights for over two decades, so the design is mature; the sight set is also available factory-direct from Ruger as the "Mark Series Williams Sight Set" for owners who want OEM packaging.

Fitment varies by variant. The standard Bull Barrel kit (P/N 602588) fits Mark II, III, and IV bull-barrel pistols, including 22/45 bull-barrel variants listed by TANDEMKROSS. The 22/45 Lite kit (P/N 633505) is the separate Williams/TANDEMKROSS page for Lite models. Confirm which barrel/front-sight profile your pistol has before ordering; a Mark IV 22/45 Tactical or Lite can use a different front sight system than a Mark IV Target with a bull barrel.

The Eagle Eye and Williams Firesights solve the same problem; the Eagle Eye costs more, has user-swappable color rods, and uses a slightly taller sight plane. The Williams set is the right pick for shooters who want a proven inexpensive upgrade and do not need color flexibility. Both are vastly better than factory black-on-black blades.