This is a fully printable duck call. My son wanted one and I could not find anything here but searching the web I found these files on GrabCad which worked. This was designed by Doug Lanter http://www.RackEmCalls.com

Original Source:

http://grabcad.com/library/duck-call

Print one each of the files. I printed in PLA so the parts would fit together better (no shrinkage). The reed even printed and worked. I printed all at .20mm Layers and 20% infill and 3 shells except the Reed which was printed at .10mm layers because it was thin.

I had to scale the image up and it could probably use enlarging just a tad.