The MP 40 is a submachine gun that gained notoriety during World War II. It was known for its distinctive shape and efficient design, utilizing a blowback-operated mechanism. The weapon featured a 32-round detachable box magazine and had an effective range of around 100 meters. Its compact size and reliable performance made it a popular choice among German soldiers, earning it the nickname "Schmeisser" in reference to its designer Hugo Schmeisser.