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|fullname = Carbine, Machine, STEN, 9mm

The STEN was , or Sten gun, is the name given to a family of blowback-operated British submachine guns chambered in 9×19mm Parabellum. They were used extensively by both British and Commonwealth forces throughout World War II and the Korean War. They The word "Sten" is an acronym, and was created from the names of the weapon's chief designers: the "S" comes from Major Reginald V. Shepherd, the "T" from Harold J. Turpin, and the "En" stands for the Enfield factory. All models of Sten gun had a simple design and a very low production cost, making them effective insurgency weapons for resistance groups, and they continue to see usage to this day by irregular military forces. The Sten gun served as the basis for the superior later Sterling submachine gun, which replaced the Sten in British service until the 1980s, when it and all other submachine guns were replaced by the {{doll name|L85A1|AR|2}} SA80 family of assault riflerifles.<ref name = "sten wiki">[[wikipedia:Sten|Wikipedia entry on the Sten gun]]</ref>

The Sten was created during a time of desperation. The British military had suffered great materiel losses during the evacuation at Dunkirk, and needed a submachine gun that could be quickly manufactured to help resupply the their armed forces. At the time, the British had been purchasing large quantities of Thompson submachine guns from the United States. However, Thompsons were time-consuming and expensive to produce, being anywhere from $70-200 per unit. As a result, the guns Thompson, while it was an effective weapon, simply could not be produced fast enough. And so, and so the Royal Small Arms Factory at Enfield was commissioned to design an alternativesubmachine gun.<ref name = "sten modernfirearms">[https://modernfirearms.net/en/submachine-guns/great-britain-submachine-guns/sten-eng/ Modern Firearms entry on the STEN]</ref>

The design of the Sten gun is credited to Major Reginald V. Shepherd and Mr. Harold John Turpin. Major Shepherd was the inspector of Armaments armaments in the Ministry of Supply Design Department at The the Royal Arsenal in Woolwich, while Turpin was the Senior Draughtsman of the Design Department at Enfield. The design they came up with shared many design elements, such as its the side-mounted magazine, with the Lanchester (an earlier submachine gun design, the Lanchester (that was essentially a British copy of the German MP28). Unlike the Lanchester, however, the Sten was designed to be as cheap and easy to produce as possible. To this end, the Sten was built primarily of simple stamped metal components and required only minor welding, which meant minimal machining and manufacturing was needed to build one. In terms of mechanical operation, the Sten was also incredibly simple. The Sten was a blowback-operated submachine gun firing from an open bolt, with a fixed firing pin on the face of the bolt. This means the bolt remains to the rear when the weapon is cocked, and on upon pulling the trigger the bolt moves forward from spring pressure, stripping the round from the magazine, chambering it, and firing the weapon all in the same movement. There is no breech locking mechanism, so the rearward movement of the bolt caused by the recoil impulse is arrested only by the mainspring and the bolt's inertia. The German {{doll name|MP40|SMG|2}}, Soviet {{doll name|PPS-43|SMG|3}}, and US {{doll name|M3|SMG|2}} submachine guns were all made with a similar design philosophy to that of the Sten: simple to make, easy to maintain, and cheap to produce.<ref name = "sten forgotten weapons">[https://www.youtube.com/watch?v=8-PmLxkOmaM Forgotten Weapons video on British submachine guns]</ref>

The Sten gun was known to suffer from a number of design faults. Stoppages were not uncommon, and could occur for a variety of reasons, with some as a result of poor maintenance while and others were being particular to the Sten. Carbon buildup on the face of the breech or debris in the bolt raceway could cause a failure to fire, while a dirty chamber could cause a failure to feed. Firing the Sten by grasping the magazine with the supporting hand tended to wear the magazine catch, altering the angle of feed and causing a failure to feed. Additional problems stemmed from the Sten's magazinemagazines, which was a were direct copy copies of the one ones used in the German MP-40. The A Sten magazine had two columns of 9mm cartridges in a staggered arrangement, merging at the top to form a single column. While other staggered magazines, such as the ones used in the Thompson, fed from both the left and right side alternately, the Sten magazine 's magazines required the cartridges to gradually merge at the top of the magazine to form a single column. As a consequence, any dirt or foreign matter in this taper area could cause feed malfunctions. Additionally, the walls of the magazine lip had to endure the full stresses of the rounds being pushed in by the spring. This, along with rough handling of the gun, could result in deformation of the magazine lips (which were required to be at a precise 8° feed angle in order to operateproperly), resulting in misfeeding and or a failure to fire. The slot on the side of the body where the cocking knob charging handle ran was also a target of criticism, as the long opening could allow foreign objects to enterinto the internals of the gun. The open bolt design of the Sten, combined with its cheap manufacture and rudimentary safety devices , also meant that the weapon was prone to accidental discharges, which proved especially hazardous. A simple safety could be engaged while the bolt was in the rearwards (cocked) position. However, if a loaded Sten with the bolt in the closed position was dropped, or the butt was knocked against the ground, the bolt could move far enough rearward to pick up a round (but not far enough to be engaged by the trigger mechanism) and the spring pressure could be enough to chamber and fire the round.

The STEN would see various improvements following its adoption in 1941. The first model of Sten gun produced, the Mk.I, featured a conical flash hider, a wooden grip on the stock, and a wooden front grip that could be folded up under the barrel. Only about 100,000 of Mk.I Stens were produced before the far simpler Mk.IIdesign was implemented. The Mk.II was the most common version of the STEN at Sten gun used by British forces, with around 2 million units produced. The foregrip and flash hider from the earlier Mk.I were removed from this variant, and a simplified stock design was usedintroduced. The simplification of the Sten gun design would culminate in the Mk.III, which would end up being the 2nd most produced variant, as well as the version in use by the time of the Normandy landings. The Sten, especially the Mk.II, tended to attract affection and loathing in equal measure. Its peculiar appearance when compared to other firearms of the era, combined with sometimes questionable reliability, made it unpopular with some front-line troops. However, a well-maintained (and properly functioning) Sten gun was a devastating close-range weapon for sections previously armed only with bolt-action rifles. In addition to regular British and Commonwealth military service, Stens Sten guns were air-dropped in large numbers to resistance fighters and partisans throughout occupied Europe. Due to their slim profile and ease of disassembly/reassembly, they were good for concealment and guerrilla warfare.

The Sten, even with all its faults, served through the Second World War and into the Korean War. The Sten was eventually replaced by the Sterling submachine gun in 1953, and was began to be gradually withdrawn from British service beginning in the 1960s. Other Commonwealth nations followed suit, either by creating their own replacementsfor the Sten, such as the Australian Australians with their F1 submachine gun, or by adopting foreign designs. The Sten does continue to occasionally show up in the hands of insurgents, militias, and irregular military forces.

As the artist for Sten, 真名, revealed on his/her weibo through a series of Weibo posts, Sten's original concept design was similar to evoked the character of Little Red Riding Hood, as advised by . Aspects of the final design came about through the advisement of {{doll name|Beretta Model 38|SMG|2}}'s artist ALLENES, who suggested that they "Give her a little red hat". By a 'red hat', ALLENES apparently meant a red beret.<ref name= "sten weibo1">[https://weibo.com/1936540534/D0XZdkuPS?from=page_1005051936540534_profile&wvr=6&mod=weibotime&type=comment#_rnd1524382516452 Artist Sten artist Weibo Post post #1]</ref>

Due to the her weapon being meant as a cheap alternative due to lack of funding, the 真名's second draft of Sten's design was given saw her sporting a plain grey dress, similar to Cinderella's.<ref name= "sten weibo2">[https://weibo.com/1936540534/D0Y0Gk8aF?type=comment#_rnd1524382513114 Artist Sten artist Weibo Post post #2]</ref>

Finally, 真名 settled with on a feminized version of the traditional English working class outfit of that the era: a suspension-belt skirt, red jacket, the aforementioned red beret, and a white shirt.

|costume2= [Digimind Neural Upgrade]

File:Sten MkII_costume2_S.png|Digimind Neural Upgrade profile imageFile:Sten MkII_costume2.png|Digimind Neural Upgrade full artworkFile:Sten MkII_costume2_D.png|Digimind Neural Upgrade full damage artwork

File:WaringWarning! Monsters Incoming! Login Wallpaper.png|"WaringWarning! Monsters Incoming!" Login wallpaper illustrated by ???.

| trivia =*The Sten gun first saw action in the Dieppe raid with Canadian Forcesforces. Weeks prior to the scheduled raid, the first issuing of the Sten gun to the Dieppe Raiders occurred, and the Canadian soldiers quickly found out about the Sten's numerous quirks and faults. So, during the weeks leading up to the raid , the Canadians spent the a great deal of time fixing, filing, and adjusting their weapons' to fix faults. By the end of this period, making them somewhat decent and the Canadians had managed to transform their Stens into fully battle-worthy guns.<ref name = "sten canadian soldiers">[https://www.canadiansoldiers.com/weapons/smgs/sten.htm CanadianSoldiers.com entry on the STENin Canadian service]</ref> However, when the raid was first cancelled in July, the Canadians' modified STENs were withdrawn. When the raid was later remountedun-cancelled and rescheduled, the Canadian forces received brand-new Sten guns, crated and packed in grease, which . These new guns were very much useless to the troops, as they still had their the very common manufacturing defects which the Canadians had corrected weeks prior to with their previously issued guns. This situation obviously disgusted many of the troops. The Dieppe raid in the end was a catastrophic failure, seeing 3.6 thousand of the 6000 predominantly Canadian soldiers being killed, wounded, or captured due to extremely poor British leadership.<ref name = "sten dieppe wiki">[https://en.wikipedia.org/wiki/Dieppe_Raid Wikipedia entry on the Dieppe Raid]</ref>

*The Sten Mk. II was one of the weapons used by Jozef Gabčík, the leader of the Czechoslovakian SOE team tasked with assassinating SS-Obergruppenführer Reinhard Heydrich. Unfortunately, in line with the STEN's famous unreliability issues, the firearm jammedat the crucial moment. Seeing this, anoher another member of the group, Jan Kubiš, proceeded to toss a modified Antianti-Tank tank grenade into Heydrich's car after Heydrich ordered the driver to stop so he could shoot Gabčík. The resulting explosion severely injured Heydrich, and several months later those injuries caused him to enter a coma he never awoke from. Both Gabčík and Kubiš later died after a 6 hour long gunfight against the SS at a cathedral in Prague along with the rest of the paratrooper team that was inserted by the SOE.**Sten's in-game skill, a hand grenade, is allegedly a tribute to Jozef Gabčík and Jan Kubiš' actions during the war.*Captured Sten Mk. II submachine guns were redesigned by the Germans, and designated the MP 3008(or Gerät Neumünster). The MP 3008 shared the same receiver design as the Sten, but changed the location of the magazine. The MP 3008 was used by the Fallschirmjägers(German paratroopers) and the Volksturm because of its reliability and cheaper maintenance cost than its counterparts, counterpart the MP 40.<refname = "wiki mp3008">[https://en.wikipedia.org/wiki/MP_3008 Wikipedia article on the MP 3008]</ref>*Following her neural upgrade, Sten switches over to using a Mk.IIS, an integrally suppressed version of the Sten produced at the request of the Special Operations Executive (SOE) for use in clandestine operations in occupied Europe.*Her The poster for Sten's "Reciprocated Love" costume poster is hanging on the wall in episode 6 of the 2022 Girls' Frontline anime adaptation.