Lincoln's Revenge - Rapid fire penny shooter

First of all, this is not a toy and is for adults only. Do not shoot at people, yourself or animals. Don't be a dick!

I'll warn ya that this can be a kinda fussy thing to build. The tolerances have to be pretty tight for the pennies to come out of the hopper without jamming. If it's a bit too tight, I recommend gluing some sandpaper to a board and sanding down the Rack Slide.stl till you get a smooth but tight running fit. If it's too loose, find something slick that you can cut out and tape to the bottom of the Rack Slide to tighten up the gap, but be sure it moves freely.

You'll need some metal 3/16" rod. You'll also need to file some flats on so that it can snugly fit into the Left Pinion.stl's hole.

Secure the left pinion onto your rod FIRST, add some SuperGlue for added insurance. Then, glue on the Crank Pinion after threading through the axle hole. Before the glue sets, insert the rack slide and rotate both of the pinions so that the last tooth of the pinions both rest on the last tooth of the rack. This way they both will be aligned perfectly

Update:
Didn't think about other countries not having endless USA pennies in their couches and ashtrays of their cars. So I added some 'ammo' to print for those outside of the USA.