Quilly,
What gun do you want to put these on? And is it just for the purpose of also using iron sights?? Or do you realy want to be able to fully remove the scope and rings? Cause if you just want to be able to use iron sights at time, Weaver makes a set-up called Pivot mount rings. Check them out to see if they would be useful for you. If you are definitely looking for Quick detachables, I' ve heard from a bunch of folks that Leupold is good one.

http://www.weaveroptics.com/access/pivot.html