How do those Conetrol rings compare to the Sako Optilock? Do they slide in and stop like the Opti's? The plastic insert in the Sako looks like a good idea.
No height specs for Conetrol either...
The Conetrols do not have a limiter pin like the Optilocks. They fit very tightly onto the dovetails, however, by way of friction (it's a tapered dovetail, so it's only going to go so far) and a small set screw on top of each base. The set screw really doesn't do much at all, the mechanical friction between a taper that's getting smaller (the base) against a taper that's getting larger (the receiver) is what does the trick.
The Optilocks are very nice also. I use those on my Stainless Sako (see below). I've never had a problem with either brand. The thing I like about the Conetrols is the looks and the height, medium Conetrols being lower than low Optilocks. The thing I like about the Optilocks is the insert, which eliminates alignment problems and scope marks. What I don't like about the Optilocks are the rings screws, which are too delicate (soft) IMHO.