Crossbow
thingiverse
Watch me here: https://youtu.be/ZkKrWPtGwWw This thing shoots out with a simple pencil or whatever you've got lying around. I'm printing it with a 0.4mm nozzle, nice and fine, and a 20% fill - that's just enough to make sure everything holds together tightly.
Download Model from thingiverse
With this file you will be able to print Crossbow 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 Crossbow.