Carrying weapons from the car back to my apartment in a shared building elevator is one of the main reasons I want a house with an attached garage next. It's perfectly legal in California to have uncased longarms in the trunk, and my car actually can't fit big rifle cases in the trunk (only soft cases or uncased rifles) without putting down the rear seats.

The look on a neighbor's face when you've got a TRG-42 slung over your shoulder in the elevator is priceless...