Description

Factory Ruger Rear Sight ALLEN Lock Screw Mark 1 2 3 4 IV and 22/45

Fits most Ruger Mark Series Pistols (see notes below)

Ruger Mark IV pistols from late 2018 on have a NEW rear sight
This part is NOT compatible with the new design sight (see pictures above)

Very early Adjustable sights were “MICRO” brand and I’m not sure if this screw will work with those sights

ALSO will NOT fit the re-designed Rear sight that is currently shipping on Makr IV pistols (has two lock screws)