So would this mean that CA’s own AWB is/will be void?
I would certainly hope so. The fact that "assault weapons" are particularly well-suited for militia use might even give them special protections.
Another interesting aspect of this is that it may invalidate all CA registration laws. I would certainly argue that CA history includes registration of "assault weapons", with a state promise of no confiscation, followed by a ban and confiscation. In the same way that states with a record of racial discrimination in voting are held to a more strict standard than those without this record, CA deserves to be placed on a "bad actors" list as far as firearms laws are concerned.
I would hope we could argue that any confiscation history makes a state ineligible for any registration scheme.
In any case, it's fun to see a big spanner get tossed into the totalitarian gears once in a while...