Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2288750.

This is the V-Hook gun mount for a proton pack. It is made so the base is held on by two bolts and two nuts inside the pack. If you want to be screen accurate, the bolts should be flat blades. The female piece is bolted/screwed to the proton wand bottom. You can also use this as a hook for your trap and holster.