Williams 616319 Adjustable Firesight Fiber Optic Sight Set for Ruger Mark 1, 2, 3, 4 with HEAVY TAPERED Barrel

Fiber Optic Firesight for Mark II and IV pistols features a click adjustment design for windage and elevation adjustment, high visibility fiber optics for target shooting and hunting, and improved visibility in low light conditions. CNC machined out of high-grade aluminum.

Fit Details: Only fits HEAVY TAPER (see pics) models with a .125″ thick front sight. The roll pin hole for the front sight needs to be drilled by a gunsmith.Model #: 616319