Maschinenpistole 40

The MP 38 and MP 40 (MP designates Maschinenpistole, literally "Machine Pistol") were submachine guns developed in Nazi Germany and used extensively by paratroopers, tank crews, platoon and squad leaders, and other troops during World War II.

Machinepistole 40 in The War That Came Early
As the German's charged through the Low Countries and into France, the German soliders used the MP 40 for their close combat fire fights. The French army had never issued sub-machine gun's to their own troops, and so many took the MP40's from dead wehrmact troops and use those.