A firearm rack is mounted on door hardware in the door opening of a vehicle in which the door has been removed. The firearm rack may be mounted in sockets provided by a door hinge half connected to the vehicle. A brace may be provided to prevent rotation of the firearm rack. The firearm rack may be fixed to door hardware exposed by removal of the door, such as the sockets, the hinge plates or the screw openings of the door opening. The firearm rack may be inboard of the outside of the vehicle.