9x19mm Parabellum

MP40: The Iconic Firearm of World War II

The MP40, often called the "Schmeisser" by Allied forces, is a legendary submachine gun that played a pivotal role in World War II. Renowned for its compact design, reliability, and performance, the MP40 is an iconic symbol of mid-20th-century firearms technology.

Production and Service History

Origins and Development: The MP40, officially known as the Maschinenpistole 40, was developed by Hugo Schmeisser's team at Erma Werke in Nazi Germany during the late 1930s. It was designed to replace the earlier MP38, addressing production complexities and cost issues associated with the earlier model.

Production Efficiency: One of the MP40's notable achievements was its relatively straightforward and cost-effective production. The extensive use of stamped steel components, a simple blowback action, and fewer precision-machined parts made it easier to manufacture compared to its predecessor and other contemporary submachine guns.

Service in World War II: The MP40 saw extensive service with the German military during World War II. It was a standard issue firearm for many infantry units, tank crews, and paratroopers. Its compact design, relatively low weight, and the ability to deliver automatic fire in close-quarters combat made it a versatile weapon on the battlefield.

Post-War Influence: After World War II, the MP40's design and lessons learned from its production influenced the development of numerous submachine guns worldwide. It served as a blueprint for many post-war designs, such as the Israeli Uzi and the Spanish Star Z-45.


The MP40's design is characterized by several key features that contributed to its effectiveness:

Blowback Action: The MP40 utilizes a simple blowback action, where the energy from the fired round forces the bolt rearward to eject the spent cartridge case and chamber a new round. This design choice simplified manufacturing and maintenance.

Open-Bolt Design: The MP40 fires from an open bolt, meaning that the bolt remains to the rear until the trigger is pulled. This feature enhances safety and reduces the risk of an accidental discharge.

Foldable Stock: One of the MP40's defining characteristics is its foldable stock. The stock could be extended for more stability during aimed fire or folded to create a more compact weapon for transport and close-quarters combat.

Detachable Magazine: The MP40 featured a detachable box magazine typically holding 32 rounds of 9mm ammunition. The use of detachable magazines allowed for quicker reloads, essential in combat situations.


Several variants and adaptations of the MP40 were developed to cater to different roles and needs:

MP38: The MP38 was the predecessor to the MP40 and was similar in design. It was primarily used in the early years of World War II before the MP40 became more widely available.

MP41: The MP41 was a hybrid design that combined features from both the MP40 and the MP28 submachine gun. It was produced in limited quantities and primarily issued to police units.

Steyr MP34: Nazi Germany captured a significant number of Steyr MP34 submachine guns from Austrian and Czechoslovakian arsenals and issued them alongside the MP40.

Interesting Facts

Nicknames: The MP40 was often referred to as the "Schmeisser" by Allied forces, even though Hugo Schmeisser did not directly design it. This misnomer likely resulted from confusion with earlier submachine guns designed by Schmeisser.

Collectible Icon: The MP40 has become a highly sought-after collectible firearm, known for its historical significance and iconic design. Original MP40s are often found in private collections and museums around the world.

Cultural Impact: The MP40 has made numerous appearances in films, video games, and popular culture. It is often associated with World War II-era German soldiers and is instantly recognizable to enthusiasts and historians.

Caliber Conversion: Some MP40s were converted to fire 9mm Parabellum ammunition instead of the original 9x19mm rounds. This conversion was often done to make the weapon more compatible with available ammunition supplies.


The MP40 submachine gun, with its iconic design, historical significance, and role in World War II, remains a symbol of military innovation and effectiveness. Its production history, simple yet reliable design, and various adaptations have contributed to its status as a legendary firearm. While no longer in military service, the MP40 continues to capture the imagination of collectors, historians, and enthusiasts worldwide, reminding us of its lasting impact on the history of firearms.


  • MP40 - Name
  • submachine gun - Type
  • Steyr-Mannlicher, Erma Werke, Haenel - Manufacturer
  • 40 - Model
  • 9x19mm Parabellum - Caliber
  • straight blowback - Action type
  • Heinrich Vollmer - Designer
  • 1938 - Designed
  • 1939 - In service
  • 3.97 kg - Weight
  • 833 mm - Length
  • 100-200 m - Firing range

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