Here is a functional printable assembly of the iconic 1928 Thompson sub-machine gun. I have modelled it from technical drawings and then modified part dimensions and certain assembly tolerances so that is printable. The stock, barrel and receiver all break down into two parts which that fit together before assembly so that it can be printed on a smaller bed size. In total there are 65 parts and individually they will all print within 200 x 200x 200mm print volume.