Abstract: A scabbard for mounting a long gun, includes: a one-piece, rigid cover having an enclosed bottom end, an open top end, and two generally parallel sides separated by a back; a padded, protective lining attached to the rigid cover; an attachment mechanism for removably attaching the scabbard; a detachable strap attached to a top open end of the device for closely holding the gun barrel, and a barrier across an open front of the scabbard for holding in the gun butt. The scabbard preferably has a padlock for locking down the gun barrel. The scabbard may have a locking hinged lid mechanism instead of a strap and barrier. The scabbard can be mounted vertically, horizontally or diagonally, preferably in or on a vehicle. A method for making the scabbard is also included.