I have an account with Ancestry, and they have the Marine rosters for WWII on there. So you can see usually about every 3 months where the Marine was and what he was doing.
I forget what that MOS is. I used to have a handy cheat sheet on my computer when I was more into collecting uniforms. But don't have it anymore. I will ask my buddy tomorrow and get that info for you.
Yeah the Reisings were everywhere, the Marines had a ton of them. In fact they had almost more Reisings than they did 1903's.
But I will get you the contact info for the researcher and the free location tomorrow when I have a little more time.