Quote Originally Posted by john armond View Post
How about one of those lockable wall mounts mounted to the trunk lid in some fashion? The ones that secure around the receiver . It's kind of like the rifle and shotgun racks in a squad car, but wraps around the receiver more.

Some squad cars also had overhead racks mounted to the front of the cage. They held the rifles laying flat almost against the roof above the seats. Could something like that be modified to fit the trunk lid?
Then you need a "cover" to hide the gun whenever you pop the trunk to chuck in something else, though. Could work, just get some extra trunk carpet and Velcro.