For those that are confused by what is banned or allowed, here is a simple table:
Federal State Overall Result
Banned Banned = Banned
Banned Allowed = Banned
Allowed Banned = Banned
Allowed Allowed = Allowed
Silencers/suppressors have always been allowed by the Feds, but banned by the State = banned for us possessing.
CCW in Hawaii is allowed by the Feds, and allowed by Hawaii (but not issued) = allowed potentially through the Hudson CCW Reciprocity.
How Constitutional Rights come into play (Roe V Wade, Mcdonald, Heller, etc) is it prevents the Feds and/or State from banning something.
There are some exceptions such as immigration and GMO's. I believe immigration is set by the constitution to be regulated only by the federal government, not sure about GMO's.