I remember this video being posted.
Also remember the days when the cops knew you were armed because the rifles and shotguns were hanging right behind you.
Still that way here with rifles and shotguns. Can’t be loaded (chambered) though. Hunting laws, and common sense forbid that, unless you like holes in the side of your cab. Pistols and revolvers can be chambered. Same in Nevada, though once you reach California, I hear you can be taken down in a felony stop for having a copy of American Rifleman plainly visible on your seat.