this next clip from our documentary which airs tonight, it may render some of this stuff moot. the only part of a gun right now that is traceable they call the lower receiver and a serial number on where you have the trigger, manufactured and metal stamp and you can scratch it off. we went to austin, texas to interview a kid who is making these things out of a 3d printable and wants them untraceable and wants everybody to have them. watch this. wilson is on his way toward making the first disappearing ar-15. is your goal to design a gun specifically that can't be detactable at airport x-ray machines? i'm reaching out for more. i don't think guns should be observable in congress and i don't think there should be registries. >> reporter: he is not there yet but, piece-by-piece, his goal is to perfect a do it yourself a.r. based on down loads at his web side and create on 800 dollar 3d print at home. what is the goal? >> the goal is to create contempt.