NEWER Style Front Sight Blade SET SCREW for Ruger Mark 4 IV Pistols with Taper Barrels *E9*

Description This SET SCREW is for the NEWER Style Factory Ruger Front Sight Blade for Standard tapered barrels and the 75th Anniversary 40175 Model SEE PICTURES If you have an empty hole on the right side of your Front Sight, this is the set screw that goes in there.Older taper barrels used a through drilled pin. Uses 1/16″ Allen Driver