Yes it is. But why are you looking at 922(o)? That doesn't apply to you.
922(o)(2)(A) applies -- possession under the authority of a state. As a member of the California State Militia, you may possess a machine gun under that statute.
Then surely at least ONE member of a state militia (by your definition) would have one. Name one.
Oh, that’s right, we’ve been over that one. You can’t.