A Certain Scientific Railgun SA Certain Scientific Railgun S - Internet Movie Firearms Database - Guns in Movies, TV and Video GamesA Certain Scientific Railgun S
In the first episode, a criminal who was taken to a certain hospital uses a Beretta 92FS to take Erii Haruue hostage. A certain hospital Erii's friends Mikoto Misaka, Kuroko Shirai, Kazari Uiharu, and Ruiko Saten were also visiting. Taking the main characters' friend hostage was probably a mistake. In an interesting parallel to the first season, the 92FS makes a single appearance in the hands of a random criminal unrelated to the main plot, and is used to take people hostage.
Colt Government Model
The M1911 design returns as the most common pistol type in the series, this time as the Colt Government Model, being used by Anti-Skill as well as various less-than-reputable groups. The Government Models in this universe feature a "standard" curved pistol trigger instead of the actual M1911-style solid trigger which goes into the rear of the trigger guard. This is very obviously an intentional design liberty rather than an error. The Government Model is notably used by Anti-Skill officers Aiho Yomikawa and Tsuzuri Tessou as their sidearm, and STUDY leader Haruki Aritomi after being cornered in STUDY's headquarters by Mikoto; one is also claimed as a trophy from a slain enemy by Frenda Seivelun of ITEM.
Glock 18C
After being discovered by Saiai Kinuhata of ITEM, Shinobu Nunotaba disarms one of Saiai's henchmen of his Glock 18C and holds it on them. The gun is seen set to semi-automatic, which is correct as it only fires one shot.
Colt Rail Gun
In a flashback, a Colt Rail Gun is used by Misaka 1 against Accelerator in the very first experiment of the Level 6 Shift Project. The pistol differs from the real one in having an external extractor, target sights, and aftermarket grips, however it does feature a "real" M1911 trigger, unlike the Government Models seen above.
Submachine Guns
Heckler & Koch MP7A1
Before taking Erii Haruue hostage with the Beretta, while attempting to escape under the guise of being a dead patient, the same criminal opens fire on Aiho and Tsuzuri with an MP7A1 fitted with a 40-round magazine.
Assault Rifles
FN F2000 with GL-1
The standard issue weapon for the Sisters are modified FN F2000s fitted with FN GL-1 grenade launchers, designated F2000R in-universe; the rifle is nicknamed the Toy Soldier due to its (polymer, futuristic) appearance. The F2000R visually differs from a standard F2000 with its custom-made section added to the muzzle, which both serves as a flash hider and makes the rifle and launcher's forms blend together better, making it look more like one single weapon. As the F2000R is said to be rather quiet (comparable to cheap firecrackers) it can be assumed the custom muzzle device also dampens sound, although not nearly to the degree a true suppressor would. While externally identical, the F2000R's scope housing is actually home to an onboard electronic fire control suite which has features like infrared target detection, target movement prediction, and wind compensation. The F2000R's targeting suite is usually linked to the Sister's signature Electron Goggles via a cable that plugs into what would be the scope's rear lens on a standard F2000, which, among expected accuracy and ease-of-use benefits, allows tactics like firing around corners. The F2000R is notably used by Misaka 9982 and Misaka 10031, while Misaka 10032's rifle is not seen this season.
SIG SG 552
Anti-Skill's standard issue SIG SG 552 only makes a couple of cameos in this season, and is identical to its previous appearance, featuring an Aimpoint CompM2 sight, flashlight, and longer handguard section.
Sniper Rifles
SVD
A mercenary is seen using an SVD fitted with black synthetic furniture on a rooftop, to cover his faction's meeting with ITEM.
Barrett M82A1
The Sisters' full-auto M82A1, named the Metal Eater MX in-universe, is seen being aimed by a Sister in Shinobu Nunotaba's imagination of what may happen if the Sisters started resisting participation in the Level 6 Shift Project. The MX is a prototype model (thus the X), its select-fire ability was removed from the rifle's final production model. As the scene featuring an unnamed Sister using a Metal Eater MX against Accelerator in the first season of A Certain Magical Index was omitted from this season, this may be her cameo, although with the sheer number of Sisters it could just as easily be any other. As a note of trivia, much later than the anime seasons have adapted, a further development of the rifle, the Metal Eater M5, makes an appearance. The M5 is a modified MX, and thus has the prototype's full-auto setting, and has a modified grip, scope, and a water-cooled (yes, water-cooled) barrel.
Heavy Weapons
Fictional Rotary Cannon
STUDY's large mechs feature dual rotary cannons that resemble the M197 Vulcan; the autonomous, white-painted versions also feature a large tank-style cannon that fires a particle beam based on Shizuri Mugino's Meltdowner ability.
Grenades
M84 Flashbang
During her fight with Mikoto Misaka, Frenda Seivelun, after putting in earplugs and covering her face with her beret, drops an M84 flashbang grenade hidden under her skirt to disorient Mikoto. It should be noted that the pin had already been removed, as Frenda simply brushes her hand lightly across the side of her skirt and the grenade falls out, spoon already flying off. How she kept the spoon attached under her skirt is left to one's imagination.
Others
Academy City Military
When Accelerator was around ten years old, there was an incident at school involving other children that escalated to the point where the military was called in to end it. To avoid filling this page with half-a-dozen duplicates of these images, all the weapons are listed in one entry.