At the end of World War Two, the Paris Police decided that they needed a few different features on a police submachine gun than the then-standard MAS 38 offered. A few hundred were converted to the new police requirements, interestingly mirroring the characteristics that would be used a few years later when the military adopted the MAT 49 to replace the MAS 38. These changes include a barrel shroud, collapsing wire stock, and a folding magazine well. In addition, a selector lever was added to allow semiautomatic fire (the original MAS 38 was full auto only).
Thanks to the French Ministry of the Interior for providing me access to this MAS 38 to bring to you!