MP40, Britain's Stern, America's Thompson, and the Soviet Union's Bobosha, which one is better? 

Speaking of the well-known submachine guns of World War II, they are nothing more than the German MP40, the British Stern, the American Thompson and the Soviet Union's Bobosha. The output of these classic firearms is in the millions.
The MP40 submachine gun has high precision and can shoot steadily. Sten submachine guns are low in cost and easy to produce. The Thompson submachine gun has strong firepower and high single-shot damage. Bobosha has a fast rate of fire and durable leather.
So, which submachine gun is the king of World War II submachine guns?

Кино