They work very good. The Warne or Leupold (made by Warne) QD rings that lock onto a Weaver style base also work excellent.
Leupold Quick Release, 2 pics. Those tubes are straight, the camera gives a fish-eye effect up close. (Need to figure it out yet)
Warne QD rings on Weaver style base. That is not rust on the levers, for some reason the camera gives them a purple hue.