Drill press and sander snd angle grinder. The rest was with hand tools. No new holes drilled in gun. Bracket mounts in holes where peep would go and d&t and screwed front end of rail to dovetail slot filler.
Can't see in the photos. Did you screw the front of the scope base into the dovetail slot? My guess that would not be needed for the .22 but might help. I also agree, you did a great job. Give us a range report.