The Sten was a family of british 9mm submachinegun used widely by British army during Second World War and Korean War.
he official designation "Carbine, Machine, Sten" should not be confused with the common understanding of carbine; the Sten was a typical, almost stereotypical submachine gun while the term carbine is used to refer to short, light rifles. The "Carbine, Machine" element of the designation resulted from the British term for a submachine gun - "Machine Carbine" - in the early part of the Second World War.

HISORY OF THE "STEN"
The Sten emerged while Britain was engaged in the Battle of Britain facing invasion by Germany. The army was forced to replace weapons lost during the evacuation from dunkirk while expanding at the same time.Prior to 1941 and even later the British were purchasing all the Thompson submachine gun they could from the United State but this did not begin to meet demand. The American entry into the war at the end of 1941 placed an even bigger demand on the facilities making Thompsons. In order to rapidly equip a sufficient fighting force to counter the Axis threat, the Royal Small Arms Factory, was commissioned to produce an alternative.

The Sten required a minimum amount of machining and manufacturing effort by using simple stamped metal components and minor welding. Much of the production could be performed by small workshops and the firearms assembled at the Enfield site. Over the period of manufacture the Sten design was further simplified: the most basic model, the Mark III, could be produced from five man-hours work. Some of the cheapest versions were made from only 47 different parts. It was distinctive for its bare appearance (just a pipe with a metal loop for a stock), and its horizontal magazine. The Mark I was a more finely finished weapon with a wooden foregrip and handle; later versions were generally more spartan, although the final version, the Mark V, which was produced after the threat of invasion had died down, was produced to a notably higher standard.

SPEC

The sten has weight of 3.2 kg,length of 760mm and has 195mm of barrel length.STEN used the cartridge of 9x19 parabellum.use 2 action that is blowback-operated and open-bolt action.Muzzle velocity of 365 m/s.The effective range was only 60m,using 32-rd detachable box magazine.

The PPS-43 was one of the soviet type submachine gun used in world war 2.The PPS-43 used the caliber of 7.62x25mm Tokarev.The PPS developed by Alexei Sudayev as a low cost personal defense weapon for reconnaissence units, vehicle crews and support service personnel.

THE HISTORY OF PPS-43
Created in respond to a red army requirement for a compact and lightweight weapon that would provide similar accuracy and firepower while utilizing more cost-effective means of production than the Soviet PPSH-41 submachine gun being widely deployed at the time.These cost-saving measures reduced the amount of machined components to a bare minimum, cutting down machining time by more than half (2.7 hours of machining required to complete a PPS as opposed to 7.3 hours for the PPSh-41). Savings of over 50% were also noted in terms of raw steel usage (6.2 kg instead of 13.9 kg) and the number of workers required to fabricate the individual components and conduct final assembly of the weapon.

Prototypes were evaluated successfully during the spring of 1942, after which the firearm was accepted into service later that year as the PPS-42.The weapon was thrust into small-scale production during the Seige Of Leningrad.The improvements to production efficiency allowed the Soviets to increase monthly submachine gun output from 135,000 units to 350,000 weapons.

Operating mechanism

The PPS was an automaic blowback-operated weapon that fired from an open bolt. The bolt was cylindrical in shape and contained a spring-loaded claw extractor, which pulled the empty case out of the chamber and passed it to the fixed ejector housed in the lower receiver. The charging handle was integral to the bolt and was located on the right side; it would reciprocate during firing. The PPS was striker fired; the firing pin was press-fit into the bolt face and was by the striker spring (a small-diameter single coil wrapped around a steel guide rod), which was also the main recoil spring.

The PPS was fitted with a set of open-type iron sight consisting of a fixed front post protected from impact by two sheet metal plates and a flip rear sight with two pivoting notches, for firing at 100 and 200 m

The PPSh-41 submachinegun was one of the most mass produced weapon on is type of world war 2.The PPSh operated with simple blowback action , had a box or drum magazine, and fired the 7.62x25mm pistol round. It was made with metal stampings to ease production, and its chrome-lined chamber and bore helped to make the gun very low-maintenance in combat environments.

HISTORY
The impetus for the development of the PPSh came partly from the Winter War against Finland where it was found that submachine guns were a highly effective tool for close-quarter fighting in forests or built-up urban areas. The weapon was developed in mid-1941 and was produced in a network of factories in Moscow.
A few hundred weapons were produced in November 1941 and another 155,000 were produced over the next five months. By spring 1942, the PPSh factories were producing roughly 3,000 units a day.The PPSh-41 was a classic example of a design adapted for mass production.In the field, the PPSh was a durable, low-maintenance weapon that could fire 900 rounds/min. The weapon had a crude compensator to lessen muzzle climb and a hinged receiver which facilitated field-stripping and cleaning the bore in battle conditions.

FEATURES
Some of the PPSh's drawbacks included the difficulty of reloading, the tendency of the drums to jam (solved by the box magazines) and the high risk of accidental discharge when dropped - the last being a fault common to all open bolt Submachinegun design Despite these drawbacks, the PPSh-41 was still admired by Soviet soldiers for its low recoil, reliability, and lethality at close range. The PPSh fired the standard 7.62x25mm pistol round such as used in the TT-33 pistol.

SPECFICATION

Weight 3.63kg

Length 843mm

Barrel Length 269mm

Cartridge 7.62x25mm


Action blowback open bolt

Rate of Fire 900 round/min

Effective Range 200m

Maximum Range 400m

Feed System 35 box round magazine-71 round drum magazine

The MP34 (Maschinenpistole 34) is a submachinegun that use by the austrian police and subsequently by unit of the German Army.An exceptionally well-made weapon, it was used by some forces well into the 1970s.

HISTORY OF MP34
The MP34 was based on a design for the MP18.Restrictions on the manufacture of certain armaments within the 1919 treaty of versailles forbade Germany from manufacturing certain types of weapons, such as light automatic firearms.To circumvent the treaty, Rheinmetall acquired the swiss company "waffenfabrik" solothurn in 1929 and began secret production of a prototype. What was to become the MP34 was originally designated ‘S1-100’ using the company’s standard naming convention.

OPERATION
The MP34 was a selective-fire weapon firing in blowback mode with an open bolt. The return spring was located in the wooden stock and was linked to the bolt via a long push rod, attached pivotally to the rear of the bolt. Easy access to the bolt and trigger assembly was via a hinged top cover which opened up and forward by depressing two release catches. This makes cleaning procedures very easy to perform.32 or 20 round box magazines were fed in from the left side and the magazine housing was angled slightly forward to improve cartridge feeding to prevent jams. Additionally, the same magazine housing incorporated a magazine refilling feature. An empty magazine could be inserted from underneath and locked in place. From above stripper clips could be fed into the magazines.

SERVICE
In 1930, the Austrian police accepted the S1-100 as the Steyr MP30, chambered for then standard Austrian 9 x 23 Steyr pistol rounds. The weapon was also exported to Chile, Bolivia, El Salvador, Uruguay and Venezuela, and was sold in limited numbers to China, in 7.63 x 25 Mauser calibre.
With the 1938 Anschluss between Germany and Austria, the German Army acquired most of available MP30s and MP34s. A number were then re-barrelled to chamber 9 x 19 ammunition and issued to German troops as the MP34(ö) - Maschinenpistole 34 Osterreich (literally "Austrian Machine Pistol 34"). Production of the MP34 ceased in mid-1940, and manufacturing lines at Steyr moved over to the production of the MP40 – a much simpler designed weapon and far less expensive to produce than the MP34. As a substitute standard small arm, it had a relatively short combat service once quantities of the MP38 became available, though some MP34s were used by Waffen SS units in the early stage of the war in the poland and france.

SPECFICATION

Weight Loaded 4.48
Unloaded 4.25

Length 850mm(85 cm)

Barrel Length 200mm(20cm)

Cartridge 9x19m luger :9x25 mauser export


Action open bolt blowback

Rate of fire 500 round/min

Range 200-250m Effective 150-200m


Feed System 20 or 32 round box magezine feed system

MP40

The MP 38 and MP 40 (MP designates Maschinenpistole, literally "Machine Pistol") is a submachinegun developed in Nazi Germany and used extensively by paratrooper, tank crews, platoon and squad leaders, and other troops during World War 2. The MP 40 was characterized by its low rate of fire and low recoil

DEVELPOMENT
The MP 40 was descended from its predecessor, the MP 38, which was in turn based on the MP 36, a prototype made of machined steel. The MP 36 was developed independently by Erma Werke's Berthold Geipel with funding from the German Army. It took design elements from Heinrich Vollmer's VPM 1930 and EMP. Vollmer then worked on Berthold Geipel's MP 36 and in 1938 submitted a prototype to answer a request from the German Armament services for a new submachine gun, which was adopted as MP 38. The MP 38 was a simplification of the MP 36, and the MP 40 was a further simplification of the MP 38, with certain cost-saving alterations, notably in the more extensive use of stamped rather than machined parts.

Other changes resulted from experiences with the several thousand MP 38s in service since 1939, which had been used in action during the invasion of Poland. The changes were incorporated into an intermediate version, the MP 38/40, and then used in the initial MP 40 production version. Just over 1 million would be made of all versions in the course of the war.

The MP 40 was often called the "Schmeisser" by the Allies, after weapons designer Hugo Schmeisser. Schmeisser had designed the MP 18, which was the first mass-produced submachine gun, and saw extensive service at the end of the First World War. He did not, however, design the MP 40, although he held a patent on the magazine. He later designed the MP 41, which was an MP 40 with a wooden rifle stock and a selector, identical to those found on the earlier MP28 submachine gun. The MP 41 was not introduced as a service weapon with the German Army, but saw limited use with some SS and police units. They were also exported to Germany's ally, Romania. The MP 41's production run was brief, as Erma filed a successful patent infringement lawsuit against Schmeisser's employer, Haenel.

DESIGN
Both MP 38 and MP 40 submachine guns are open-bolt, blowback-operated automatic arms. Fully 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 telescoping return spring guide which serves as a pneumatic recoil buffer. The cocking handle was permanently attached to the bolt on early MP 38s, but on late production MP 38s and MP 40s, the bolt handle was made as a separate part. It also served as a safety by pushing the head of handle into a separate notch above the main opening, which locked the bolt either in the cocked or forward position. The absence of this feature on early MP 38s resulted in field expedients such as leather harnesses with a small loop, used to hold the bolt in forward position.

SPECIFICATION

Weight	4 kg (8.82 lb)
Length	833 mm (32.8 in) stock extended / 630 mm (24.8 in) stock folded
length	251 mm (9.9 in)
Cartridge	9x19mm Parabellum
Action	Straight blowback, open bolt
Rate of fire	550 rounds/min
Muzzle velocity	~380 m/s (1,247 ft/s)
Effective range	100 m
Maximum range	200 m
Feed system	32-round detachable box magazine