In California It used to be legal to carry a handgun openly, like holstered and visible, while illegal to carry it concealed.
Not sure when they changed the first part, or if they ever did. They probably did. They were well on their way to a law that required you to carry any firearm in a locked case in an area of a vehicle not accessable by the driver AND carry any ammunition for that firearm in a locked case in an inaccessible area of another vehicle driven by a different driver not related to the gun owner, with a prior permit approved for one trip at least thirty days in advance and only to an approved 'gun facility' or back from that place during daylight hours on weekends only if not national holidays.
Did you follow all that? Neither did I so I left the state.