MP40

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Maschinenpistole 40 (MP40))
Type	submachine gun
Place of origin	Nazi Germany
Service history
In service	1939 – 1945
Used by	Nazi Germany, Israel
Wars	Second World War
Production history
Designer	Heinrich Vollmer
Designed	1938
Manufacturer	Erma Werke
Produced	1940-1945
Number built	Over 1 million
Variants	MP36, MP38, MP40, MP40/1, MP41
Specifications
Weight	3.97 kg (8.7 lb)
Length	Stock folded: 630 mm (24.7 in) Stock extended: 833 mm (32.8 in)
Barrel length	251 mm (9.9 in)
Cartridge	9mm Parabellum/Luger
Action	Open bolt blowback
Rate of fire	500 round/min
Muzzle velocity	~380 m/s (~1247 ft/s)
Effective range	~ 100 m (110 yd)
Feed system	32 round detachable box magazine
Sights	Hooded blade front, fixed and flip-up U-notch rear

The MP40 (Maschinenpistole 40, literally "machine pistol 40") was a submachine gun developed in Germany and used extensively by paratroopers and platoon and squad leaders, and other troops during World War II. The MP40 had a relatively lower rate of fire and low recoil, which made it more manageable than other contemporary submachine guns.

Contents 1 History 2 Design 3 Copies and post-war usage 4 Variants and developments 5 See also 6 References 7 External links

[edit] History

The MP40 is descended from the MP36, a select-fire prototype made of machined steel, of which few examples remain. The MP36 prototype was developed independently by Erma prior to the 1938 request from the German government for a new submachinegun which led to the MP38. The MP38 was a simplification of the MP36, as the MP40 was later a simplification of the MP38, the differences being in cost-saving alterations, especially the use of more pressed rather than machined parts and an improved safety.

The changes resulted from experiences with the several thousand MP38s, (in service since 1939), used during the invasion of Poland. The changes were incorporated into an intermediate version (MP38/40), and then used in the initial MP40 production version. Just over 1 million would be made of all versions in the course of the war. The designer of the MP38/40 was Heinrich Vollmer.

The MP40 was often called the Schmeisser by the Allies, after weapons designer Hugo Schmeisser. Although the name was evocative, Hugo Schmeisser himself did not design the MP40, but helped with the design of the MP41 which was effectively a MP40 with an old-fashioned wooden rifle stock. It is impossible to reconstruct how Schmeisser was honored with this legend, but it must have been inspiring for the soldiers: the German slang-word "Schmeisser" describes someone who throws something inaccurately, but with high force. Schmeisser did produce the MP40 magazines and his name was engraved on them, which may explain the confusion.

[edit] Design

Both MP38 and MP40 submachine guns are open bolt blowback operated automatic arms. Full-automatic fire was the only setting, but the relatively low rate of fire allowed for single shots with controlled trigger pulls. The bolt features a telescoped return spring guide which serves as a pneumatic recoil buffer. The cocking handle was permanently attached to the bolt on early MP38s but on late production MP38s and MP40s bolt handle was made as a separate part. It also served as a safety by pushing the head of handle into a separate notches above the main opening which locked the bolt either in the cocked or forward position. The absence of this feature on early MP38s resulted in field expedients such as leather harnesses with a small loop, used to hold the bolt in forward position.^[1]

The receiver was originally machined steel but this was a time consuming and expensive process. This prompted the development of a simpler version which used pressed steel and electro-spot welding as much as possible. The MP38 also features longitudinal grooving on the receiver and bolt, as well as a circular opening was on the magazine housing. These features are deleted on the M38/40 and MP40.

One idiosyncratic and visible feature on most MP38 and MP40 submachine guns was an aluminum or plastic rail under the barrel which was handy as a support when firing over the side of open top armored personnel carriers such as the Sdkfz 251 half-track. A handguard was located between magazine housing and pistol grip and was made from plastic. The barrel lacked any form of insulation such as a barrel jacket seen on the MAB38 or Sten, which often resulted burns for the supporting hand if it strayed. It also has a folding stock, the first for a submachinegun^{[citation needed]}, resulting in a more handy weapon when folded, but it was insufficiently durable for hard use and hand-to-hand combat.

Though the MP40 was generally reliable, a major weak point of the MP38 and MP40 was its 32-round magazine, a weakness inherited by the British Sten which copied the same design. Unlike the Thompson's double-column, dual-feed magazine, the MP38 and MP40 used a 'single-feed' design. With the single-feed design, a double column of cartridges narrowed to a single-cartridge width at the feed end of the magazine.^[2][3] This meant that the 9 mm cartridges had to overcome increased friction in order to reach the chamber, as well as a loading device to fill the magazine to capacity.

The design was also sensitive to dirt and debris. German soldiers soon learned to give the magazine a sharp slap to restore operation.^[4] The magazine was also frequently misused as a handhold, which could also cause a failure to feed when hand pressure on the magazine body caused the feed lips to move out of position. German soldiers were trained to grasp either the intended handhold on the underside of the weapon or the magazine housing with the supporting hand (not the magazine itself) to avoid feeding malfunctions.^[5][6]

Unlike the impression given by popular culture, MP40s were generally issued only to paratroopers and platoon and squad leaders; the majority of soldiers carried Karabiner 98k rifles. However, experience with Soviet Union tactics where entire troops armed with submachine guns out-gunned their German counterparts in short range urban combat caused a shift in tactics and by the end of the war it was being issued to entire assault platoons on a limited basis.

[edit] Copies and post-war usage

The MP38 or MP40 was a pattern for diverse submachine guns such as:

• As the design of the M3 Grease Gun started, the designers looked at Sten guns and captured MP40s.

• The German semi-automatic copy of the MP38, Selbstladebüchse BD-38 (since 2005).

• The former Yugoslav military used a clone of it called the M56 submachine gun used in the various conflicts in Bosnia. They have also used some quantities of the MP40.

After the war the MP40 was still the standard submachine gun of the Israeli army and was often used in the Palestinian area. It remained the official submachine gun of the Israeli paratroopers until 1956. Some MP40s were in use by the Kosovo Liberation Army in the Kosovo War in 1999 [1].

Two MP40's were used by the LAPD SWAT team during the famous May 1974 shootout with members of the terrorist Symbionese Liberation Army.^{[citation needed]}

[edit] Variants and developments

• MP40/I - main production version
• MP40/II - experiment with a 64 round magazine. The MP40/II appeared in the latter stages of World War II. This version of the MP40 has a three-magazine sliding magazine receiver that slides horizontally to use the additional magazines as each becomes depleted. This design was intended to counter the superior firepower of the Russian PPSh-41, but made the weapon heavy and unbalanced in the field, and did not work well.^[7]. However, by 1943 the Soviets shifted the production of PPSh-41 drums to 35rd magazines to combat weapon jams.^{[citation needed]}
• MP41: A variant designed by Louis Schmiesser for the Haenel Company, which featured the receiver, operating mechanism, and magazine housing of the MP40 and the stock, trigger and fire selector of the MP28.
• Many countries involved in World War II developed submachine guns which had a similar features to the MP40 (with a folding shoulder stock, magazine as a front handgrip, and production techniques). The most famous examples are the Russian PPS-43 and the American M3 Grease Gun. Most derivative designs also copied the troublesome magazine design as well.
• BD38 - a new semi-automatic reproduction of the MP38 submachinegun

[edit] See also

• List of submachine guns
• List of common World War II infantry weapons
• List of World War II firearms of Germany

[edit] References

1. ^ Popenker, Max. Modern Firearms - MP-38 and MP-40 submachine guns. Retrieved on 2007-03-09.
2. ^ Weeks, John, WWII Small Arms, Galahad Press, 1980
3. ^ Nelson, Thomas B., The World's Submachine Guns, TBN Enterprises, 1977
4. ^ Weeks, John, WWII Small Arms, Galahad Press, 1980
5. ^ Weeks, John, WWII Small Arms, Galahad Press, 1980
6. ^ Nelson, Thomas B., The World's Submachine Guns, TBN Enterprises, 1977
7. ^ Nelson, Thomas B., The World's Submachine Guns, TBN Enterprises, 1977

[edit] External links

• Small Arms Review: The MP36 The Missing Link
• Nazarian`s Gun`s Recognition Guide on MP-38 / 40
• Polish MP-38 / 40 site
• MP40 schematics
• BD38 Page

v • d • e German-made firearms and light weapons of World War II
Side arms (Pistole)
Mauser C96 | Luger | Walther P38 | Walther PPK | Sauer 38H | Mauser HSc
Rifles & carbines (Gewehr & Karabiner)
Karabiner 98k | Gewehr 41 | Gewehr 43/Karabiner 43 | StG44/MP44 | FG42 | StG45(M) | Volkssturmgewehr 1-5
Submachine guns ( Maschinenpistole )
Bergmann MP18 | MP38/MP40 "Schmeisser" | MP3008 "Volks MP"
Machine guns & other larger weapons
MG08 | MG34 | MG42 | Faustpatrone | Panzerfaust | Panzerschreck Flammenwerfer 35 | Panzerbüchse 39 | Granatwerfer 36 | Granatwerfer 42
Notable foreign-made infantry weapons
P.640(b) | Vis.35 | Vz.24/G24(t) | MG26(t) | Panzerbüchse 35(p)
German-made cartridges used by the Wehrmacht
7.92 x 57 mm | 7.63 x 25 mm Mauser | 7.92 mm Kurz | 7.65 mm Luger | 9 mm Luger