Exactly what wrangler5 said above. Quality quick detach rings can be removed and reattached while maintaining zero as long as you remount in the same pic slots, with the same lever pressure to maintain consistency.

R/E your gun smiths comment - If you are trying to use the same scope between 2 different rifles, then he is right, as frequently taking the scope in and out of different rings risks the chance for scope damage, stripped screws, and the hassle of having to fully re-sight in each time. I have tried that route in the past, and it never worked out.

A scope with QD mounts dedicated to one rifle eliminates those issues. Put a QD mount on your red dot, and you can switch between iron, red dot, and magnified scope on the same rifle without any hassles.

Then again, there is never anything wrong with buying a second rifle....

Larry