I woudnder how the adhesive side will stand up to summer heat in a car. I used some 2" wide velcro to hold a floormat in place on the side of the footwell and summer heat made it droop down - adhesive failure. I would hate to see my firearm go bouncing around the car during a hard stop.
The bottom mount in my car has been there for over three years. It has not been effected by heat or cold. As long as you are always pulling parallel to the mount it is not going anywhere. - George