Shoot anything as long as it's small. No matter how long or short. Doesn't look like anything, great for sniping your coworkers and have plausible deniability. Print it at any settings. Tested both at 50% infill 0.2mm and “draft” preset 0% infill 0.25mm. Theoretically you can scale it to make it bigger. Made it to fit inside my Prusa Mini.

Depending on the force of your rubberband, if it's hard/impossible to launch, you may want to file the trigger down a bit where it connects with the launcher!

Assembly and operation: