For the love of all that is holy, please do yourself a favor, and avoid Millett "angle-loc" rings like the plague.
(a) I've had them just up and break in two pieces, and
(b) more importantly, every single friggin time you tighten one of the 4 screws, it changes your point of impact. Given the fact that the windage adjustment is not even needed, you're just buying many many headaches with these rings.
That's my experience, anyhow. I despise them. I've actually thrown in the trash 3 or 4 pairs.
If they work for CH47gunner, so much the better, and they do work, up until you need to tighten - then it's re-zero time again.
With some brands of rings, you might just barely be able to get away with a "low" designated ring with a 32mm objective (depends on the ring and the thickness of the metal and other materials around the objective bell). A medium would always work. I'd try a low and if that doesn't work, exchange for a medium.