Solution

This photograph is of one of my always handy weapons, its mounted under a table with a single piece of nylon webbing , three drywall screws and three washers. Even though the pistol has a Clipdraw attached to the frame its not needed, if you try this and find your assembly to be a bit loose just remove the screw, cinch the webbing a bit and try again (don’t forget to unload first). Additionally with a larger weapon I think multiple straps would work just fine 🙂