As far as the law goes, no they cant stop me if they find a firearm in a employees car they can not sue them or file any charges...BUT they can terminate on the grounds of braking company policy. Same goes for telling your boss to go fuck himself, not illegal but you may be fired. Another fucked up policy our company has is they can search you car when ever it is on company property, its uder our substance abuse poicy, and we had to sign paper to say we give consent to this, if you dont sign the paper you are no longer employed.