DMB,

already a Weaver style base on the rifle, and was considering using Warne or Leupold QD's. Even with the base attached, you are still able to use the fold up open sights if required.

VAnimrod, the combination it's in is .222rem, and 20g.
I also have one in .22WMR and 20g. That one is an older model, and isn't tapped for bases. It has a dovetail machined from the factory on top, and I'm in the process of fixing a ghost ring sight to it.

Here's a pic of the 22mag/20g after I'd stripped the paint off the stock. Just trying to final fit, sanding and a stain to finish it off.

[Linked Image]