UMP40

The official character setting states that UMP40 is a T-doll with super sunny and cheery personality, feels more superior than the others because of her UMP heritage, but she does possess a strong will and strong sense of team spirit. Most of her silly actions and speeches are purely for the purpose of gaining other's attention. UMP40 address herself with "Atai (あたい)". As evident from her secretary and logistic mission quotes, her hobby is sunbathing, which would explains why she appears more tan than the other dolls. Other than sunbathing she also seem to enjoy partying. With her cheery personality she is good at making friends with other T-dolls, perhaps the silly way she act is merely a way strengthen the relationship bonding between comrades. UMP40's best friend seem to be SMG MP5 despite saying that she is designed to replaced MP5 from service, several UMP40's quote mentions MP5, the two T-dolls seem to have frequent interactions. After the success story of MP5, Heckler & Koch continued to develop selective firing close quarter combat SMGs, one of the development outcome and the official successor to MP5 is the UMP (Universale Maschinenpistole) series. UMP SMGs are selective fire, recoil operated and fires from a closed bolt, featuring three main variants which are designed to fire 9x19mm Parabellum, .45 ACP and .40 S&W. Compared to the older MP5 model, UMP was advertised to be more reliable, more modern and lower cost, other common features of the UMP SMGs are Picatinny rails placements (Along the top of the gun, both sides and bottom of the barrel) and a foldable buttstock. UMP40 is the variant that chamber the .40 S&W cartridge, like the other two variants, UMP40 also features a 2-round burst fire mode, together with semi-automatic and fully automatic. Feeds on a 30-round detachable straight magazine, the weapon is able to reach a fire rate of 650 rounds per minute, reaching a muzzle velocity of 320m/s, covering up to 100 metres of effective range. Noted that UMP have their rate of fire reduced in order to compensate for the recoil generated from firing large pistol cartridge, making UMP series one of the slowest firing SMGs on the market. UMP SMGs were also advertised to be compact and light weight, UMP40 variant have a total length of 450mm with the stock folded (690mm unfolded), it also weights only 2.3kg when unloaded thanks to the polymer made body frame. After some FBI agent casualties during the 1986 Miami shoot out, the bureau was on the look out for a better alternative munition type than the servicing 9mm Parabellum, ideally of a bigger calibre but with a manageable level of recoil. .40 S&W was the chosen in the end with it's potential energy advantage over 9mm Parabellum and a more manageable recoil than the 10mm Auto cartridge of Bren Ten. Gaining favour and entered service with the bureau also gave it some popularity among other law enforcement units. Many other special policing units and investigative agencies all over the world have began to procure .40 S&W cartridge firearms into service, mostly in regions of Australia, Canada and the United States, sequentially boosted UMP40's sale. This also explains why unlike the other to UMPs, UMP40 is more commonly found enlisted to service with law enforcement units rather than military service.