Call Of Duty Zombies Wunderwaffe, Modeled in Autodesk Inventor, File includes all except for the emitter core rod (1/2 inch wood dowel ) a stock ( i made mine out of MDF and another out of a pine 2x6 ) and the side receiver tube (more 1/2 inch wood dowel) Assembly isnt the hardest, you should be able to go off of the images provided here, i assembled it with superglue and epoxy. Tolerances are a bit shotty as all printers use different ones, some parts may need to be sanded or scaled down slightly for proper fitting/assembly. Other parts I got from the hardware store such as wingnuts, threaded rod, nuts, metal cable, wire terminal connections and some a scrap TV cable
Heres a video on the first one I built https://youtu.be/a5iPPKipS10