What (useable) zip gun is the easiest to make without access to a workshop? Hand tools are allowed, but no 5-axis CNC machines to 3D-print parts. What caliber would you use for
![Homemade guns built for less than $20 are 'up close and personal' weapons present in Saskatchewan | CBC News Homemade guns built for less than $20 are 'up close and personal' weapons present in Saskatchewan | CBC News](https://i.cbc.ca/1.4266859.1504027593!/fileImage/httpImage/homemade-guns.jpg)
Homemade guns built for less than $20 are 'up close and personal' weapons present in Saskatchewan | CBC News
![Ventura County Star on Twitter: "This is a homemade firearm known as a zip gun, and it got a Santa Paula man arrested, according to authorities. https://t.co/ASRPk3ZrND https://t.co/IzYInxo7fh" / Twitter Ventura County Star on Twitter: "This is a homemade firearm known as a zip gun, and it got a Santa Paula man arrested, according to authorities. https://t.co/ASRPk3ZrND https://t.co/IzYInxo7fh" / Twitter](https://pbs.twimg.com/media/DgrHZqDU0AAI0lU.jpg)