Actually, while it might not work for a gun that's already been made, obviously one can make and sell guns after jumping through the various hoops the BATFE et.

Actually, while it might not work for a gun that's already been made, obviously one can make and sell guns after jumping through the various hoops the BATFE et. al. require (e.g. https://en.wikipedia.org/wiki/Federal_Firearms_License https://en.wikipedia.org/wiki/Federal_Firearms_License), adding a serial number to it, etc. I wonder what the law is for making them part of your estate.