I meant to specify 20/30/40 rings or one piece mount. Spuhr is an example, yeah.
I called Mountain Tactical about their scope bases, and their MOA rails are not designed for the Tac A1, unfortunately. They suggested MOA mounts, as others have said.
After hearing how much of a pain removing the factory rail has been for some others, I’m reluctant to. For the paint job, I decided it’s gotta come off, so hopefully using penetrating oil does the trick.