ARMS #22 rings can be used with the TRC (Tactical Ring Cap) and TRR (Tactical Ring Rail). This will give you a rail on top of the mount. However, they also make a TRS (Tactical Ring Sight) that can be put on the top of the ring as well. This is sort of like a sighting channel you can look through. I have not used it, so I cant say how well it works or to what ranges this short sight radius is good for.
This picture shows a scope with ARMS #22 rings. The ring to the front (left) has the TRC and TRR mounted. The ring to the rear (left) has the TRS mounted.