I just added Tec-Sights to my 10/22 Take-down model. For those familiar with the M-16A1/AR-15A1 type sights the front is adjustable for horizontal, and the rear is adjustable for left and right movement with two size peep holes no ghost ring. At 25yds she'll put one round almost on top of the other, at 50yds she'll stay under 2 inch's. Not bad for a plain jane 10/22 who's only special is that she brake's down into two halves.
I have the exact same set upon three take down models for the kids. Unbelievably accurate and easy for the kids to hit clays at 50 yards likes it nothing. Only wish ruger sold with the tech style sights to begin with. I know the appleseed version has aperture sights but they don't to be as easy to adjust as the tech sights.