Rear sight on Super blackhawk dumb question

[Sacramento Johnson]

Hi all,
Need to put a new rear sight on a Super Blackhawk; Ruger will be sending one to me. How do I remove the old one and install the new one?

 

[Chuck 100 yd]

Using a 1/16" drift punch! Drift out the pin that holds the front end of the sight,it is not in there all that tight. Next back out the elevation screw all the way until the sight can be lifted free. Take care to not loose the tiny springs that are under the sight. Those springs can be held in place with grease while installing the new sight.