The reason for posting is putting together a Nikon P22 and a 10/22 take down. I finally decided on a Nikon and that was the good part. It got even better when I discovered that Cabalas was having a sale this past weekend so the scope was marked down from $179 to $119. The bad part was that the sales person when I asked for rings for a 10/22 gave me Weaver medium rings. Scurrying home, I decided to put it together. I know- surprise surprise. The objective lens housing was resting on the screws for the rifle's rear sight even with the rear sight in its lowest position. It also meant that the "take down" wasn't a takedown any longer (as the barrel rotates the height of the rear sight increases. The solution was quite simple - I needed high rings. So back I went to ---. Fortunately it is only 21 miles. Lesson learned: Ruger's lovely little 10/22 take down model needs high rings.