This scope mount attaches to the rear sight elevation adjusting screw hole. You first remove the single six rear sight and replace it with our scope mount. Then insert the supplied screw into the elevation adjusting screw hole and tighten. In the front there is a set screw, that gets adjusted down just until it touches the top strap.
All of the testing of this mount was done with .22 Magnum without a single issue. We have sold hundreds of these mounts with tremendous success.
Over tightening of the set screw can cause point of impact problems. It will cause the revolver to hit low.