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| weaponinfo = Designed by KBP Instrument Design Bureau in 1991 for close quarter urban based combatscombat, the 9A-91 was designed to be a cheaper and more versatile alternative to the AS Val and Val derivatives derivative firearms such as the VSS Vintorez and SR-3 Vihkr. Development of the 9A-91 also aimed towards being able to fire other cartridges, but when the design was finalized, the 9A-91 family of firearms was set to use the 9x39mm calibresubsonic cartridge. All the weapons in the 9A-91 series were meant to replace an existing firearm: the 9A-91 carbine served as an alternative to the Vihkr/Val, derived weapons from 9A-91 such as the VSK-94 sniper rifle served as an alternative looked to be a replacement for the Vintorez, and the A-91 bullpup carbine was potentially made competing to compete against the costly OTs-14 'Groza-1'.

The conventional layout, carbine assault rifle 9A-91 carbine is a gas -actuated, rotating bolt weapon, actual operation of the gun utilizes rifle. The action is cycled using a long -stroke gas piston located above the barrel and , in a similar manner to a four lugs rotating boltKalashnikov rifle. Being one of the rifles derived from the Also in keeping with its Kalashnikov seriesroots, the 9A-91 retain retains the right side charging handle/ejection port. The gun itself has rifle used polymer for as many nonenon-essential components (such as the fore end and pistol grip) made with polymer as possible, designed in order to reduce the total weight of the gun and reduce the manufacturing costcosts. The 9A-91 is also known to be one of the most compact carbine designs in the world , having a total length of 373mm with the gun stock folded and suppressor removed (574mm with the stock unfolded).

Feeds The 9A-91 feeds from a 20 round magazine, 9A-91 and is capable of firing at a rate of 700-900 rounds per minute. The primary servicing cartridge used in the 9A-91 is the subsonic 9x39mm SP-5/SP-6, . This cartridge combined with the rifle's short barrel means that 9A-91's effective combat range is restricted to below 100 metresmeters, hence the flip-up rear sights only have having settings up out to 200 metresmeters. Various Russian -issue optics can fit on the rails provided on the left side of the receiver. The 9A-91 is currently in service with law enforcement units in Russia.<ref name="9A-91 wiki">[[wikipedia:9A-91|Wikipedia entry on 9A-91]]</ref>

| design =The T-Doll 9A's petite size might be a reference to the small size of the 9A-91 carbine, assuming . Assuming the actual rifle is drawn to scale and used as a comparison, 9A -91 only measures up to approximately 140cm of height. The red beret hat she is wearing wears is a reference to the Russian internal service troops' uniform, though she wears her beret in a different direction than the other Russian T-Dolls such as {{doll name|OTs-12|AR|3}} and {{doll name|AK-47|AR|3}}.

The artist 防弹乳牛 would comment commented that the appearance of 9A-91 was inspired by the character Tobiichi Origami of from the anime Date A Live. (在构思角色的时候参考了《约会大作战》的鸢一折纸。在构思角色的时候参考了《约会大作战》的鸢一折纸.)

The 9A-91 as a weapon was developed while the USSR was undergoing the process of dissolution, so many character design feature features of 9A are purely Russian -based instead of being influenced by Soviet designs. Despite this, she still sports a post-WW2 Soviet infantry pin on her beret. This might also be a reference to the fact that while 9A series of rifles being are classified as Kalashnikov derivatives but is , the two are very different in both exterior design and internal mechanism function. Though she still however wears a post WW2 Soviet Infantry pin on her beretmechanics.

The weapon on the in 9A-91's official art featured arts feature different optical sights, . She uses a Kobra optic can be found on in her default appearance , while the PK-AS is found on used in her Bullet 'Bullets Cafe outfit' art. But Regardless of this, the character 's chibi sprites for both costumes only features the Kobra. The weapon's stock appears to be smaller than it should be on the default art, but it appears to be the normal size on the costume in her 'Bullets Cafe' outfit.

| trivia =

**At last, the The T-doll {{doll name|AK-74U|SMG|5}} was would later be announced in July/August 2018 together with as part of the 2018 summer event Continuum Turbulence.*KBP , at the time even of the 9A-91's creation, developed a cheaper version of the SP-6 subsonic cartridge named . Named the PAB-9round, it was originally intended to further reduce the cost for all the subsonic cartridge firing weapons. Unfortunately , only the 9A-91 derivatives can fire the PAB-9, as it caused serious damage to Val, Vintorez and Vihkr's barrel barrels when used. In addition, that and it's its performance is was nowhere near that of the SP-6, and the PAB-9 was soon discontinued.*Due to cost-lowering efforts. , 9A-91 Magazine was magazines were changed from 10/20/30 round polymer magazine magazines to its now-signature 20 round straight steel magazinemagazines.**Because of this, the 9A-91 is unable to use the magazines of other 9x39 9x39mm weapons magazine , nor lend them its own magazine for other 9x39 weapons to use magazines (Unless it's unless its a VSK-94).