This Ruger manufactured no bump adjustable rear sight sub-assembly is for the old model 3 screw Single Six single action revolver and is in very good condition with light wear. This sub-assembly consists of the body without bump, blade, windage spring and windage screw. (file photo)
Note: Ruger old model Single Six revolvers with the following serial numbers have been observed with this part: 564324 & 60-38236.
