With all the different height one piece mounts available why go with a rise and rings? All I see that doing is adding one more joint to possible loosen.
That would make it too easy.
Hmm, most bolt guns. Reciever. Bolted down base. Rings bolted to base.
ARs Reciever. Riser bolted to base. Rings bolted to riser.
Somehow it works on bolt guns mostly.