CO2 Rockets
thingiverse
CO2 rockets are a great project for building your own launcher. To get started, you'll need some specialized materials. The PVC pipe I'm using is a thin-walled 3/4 inch pipe that's perfect for this type of project. It's available on Amazon and other online retailers.
Download Model from thingiverse
With this file you will be able to print CO2 Rockets with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on CO2 Rockets.