While this zip gun was made in our shop, it certainly could have been homemade. It uses off-the-shelf tubing and a welded on endcap which holds the modified screw firing pin. The price tag is for materials only. Please note that in the US this is considered an NFA firearm and would be illegal to make without the proper paperwork. Any questions about what that means can be answered on the BATFE's website (www.atf.gov). When we made this video we had just come back from The Wing House ( with the requisite intake of wings and beer) so it has a bit of silliness in it. And no, the shooter didn't partake....he doesn't drink!! Enjoy.