Several states have laws or pending legislation similar to or identical to the expired federal so-called, assault weapons ban.
USA vs. Miller made it clear that weapons used by the military were and are protected subject to the now defrocked, Militia Collective Right Theory we’ve lived under for 70 years.
The Court in D.C vs. Heller avoided defining constitutionally protected weapons other than to say that, It protects handguns and other weapons "in common use." The court suggested that dangerous or unusual weapons may not be protected and sidestepped saying just what those were.
In order for the gun control lobby to press their case for the assault weapons ban they told any congressman or legislators that would listen that these assault weapons were absolutely everywhere. That makes the case that the temporarily banned scary looking black semi-automatic rifles and pistols with large capacity magazines were and still are, in common use.
On its face the Heller case seems to enjoin federal, state and local governments from at banning or re-banning these weapons currently legal in most states.
My informed guess is the laws of California against weapons of common usage like large capacity rifles and .50 caliber weapons are unconstitutional under Heller.