Yeah, If you have any experience with creating your own 3D CAD files for printing it would be trivial to go into files yourself and fill in the void for the met

Yeah, If you have any experience with creating your own 3D CAD files for printing it would be trivial to go into files yourself and fill in the void for the metal. I doubt it would have a significant impact on the gun's performance. While I can't see this particular model being used as as spy weapon, the potential is certainly there as the technology improves.