"My grandfather made a zip gun from a a car antenna"
You're comparing a zip gun made with a car antenna to what a hobbyist can do at home these days? Seriously? How long ago did you get out of the business?
"...a decentralized collective of gun designers operating under the group name ‘Deterrence Dispensed’ have perfected a method of producing DIY 9mm barrels which not only match but potentially can exceed the quality and performance of many professional factory produced barrels. The best thing about this method is that this allows you to produce barrels without needing a workshop and can even be made quietly in the comfort of one’s cozy apartment. Along with a $200 Ender 3 3D printer, parts for this setup cost less than $100 and the process of making each barrel takes less than 30 minutes to complete."
17 posted on 01/24/2020 8:17:13 PM PST by Garth Tater
(What's mine is mine.)