Thanks for fixing that youtube, Dan.
Interesting concept. A single shot shotgun, that you can instantly disassemble and use the barrel as a tonfa for last ditch self defense.
20 years ago when an Indonesian chap was asking me for ideas on how to stop the thugs from breaking into his house and raping his sister, I would have loved to have some zip gun plans to give him, if and only if I knew where he could buy shotgun shells.