Ok range test = fail. Can't hold zero. Either gotta use a shorty or a dot, mounted as far back as you can comfortably look. The previous setup with rings was fine, held 0 on 3 range sessions, but the way pictured, its mounted too far forward and the naysayers were absolutely correct. My SKS sight adjustment tool is a little too narrow to fit, so temporarily, I just have to do Kentucky windage with the irons until I dot it.