Penny launcher
thingiverse
You will have to cut the magazine holder and need rubber bands to make it work. If you use common sense looking at it you will know how it works.
Download Model from thingiverse
With this file you will be able to print Penny launcher 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 Penny launcher.