The groups my son shoots with peep sights are always half the size of standard open sights so I want to surprise him and install a receiver sight on his Ruger 10/22. Does anyone have any experience with the Williams WGRS sight? Its the one that mounts in the two rear scope base holes. I am hoping that with all the additional sight radius and different diameter rear apertures it will help both of us shoot the 10/22 better.