I saw the actual thread a week ago where to guy goes through the steps of building it. I may have missed it, but do you legally need to do paper work on the receiver, even if you build it out of random materials, such as a shovel?
"Boris isn't clear on the subject, but a fair amount of vodka went to the decision-making process."
I know how you feel, Borris...I know how you feel.
Great comment at the bottom: "Great, now I won't be able to take my shovel on a plane."