Guys, I remember I had a neat sight from a long-defunct company called "One Ragged Hole" . Ostensibly, it is a peep sight that is affixed to the barrel sights by removing the stock "V" rear sight (two screws) and sliding the peep into place. I had one on my 9422 and it works great.
Is this what you have? Kinda.
https://warrencustomoutdoor.com/ohs-ruger.html