Desi Sten 9mm tamancha auto

American make Desi Sten

“Sent in to TFB is another concept design for an ‘afternoon’ DIY submachine gun of particular crudeness and expediency. The majority of components are laminated together from readily available square section steel tubing, owing to its namesake. Apparently the only thing that cost anything was the STEN mag and compression spring. The model shown is a non-firing mock-up dummy for the purposes of demonstration only.” The Firearm Blog

For academic study only drawings of historical design.