The German sub-machine gun EMP (Erma Maschinenpistole) also know as MPE (Maschinenpistole Erma) was produced by Erma factory was based on designs acquired from Heinrich Vollmer. The gun was was produced from 1931 to 1938 in roughly 10,000 exemplars (in three main variants) and exported to Spain, Mexico, China and Yugoslavia, but also used domestically by the SS. It was produced under license in Spain by the arsenal of A Coruña under the name of WFP Mle 41/44.