Metal Eater (鋼鉄破り (メタルイーター) Kōtetsu Yaburi (Metaru Ītā), lit. "Steel Breaker") is the nickname given to a series of powerful anti-tank sniper rifles used by Academy City in the universe of Toaru Majutsu no Index based on the Barrett M82A1. Famous for blowing up a tank from 2000 meters away during the Gulf War, the massive recoil of these rifles makes them hard to use for unexperienced users, even dangerous, as it can smash as shoddy helmet into pieces.
There are several iterations of the rifle. The first seen in the series is the Metal Eater MX, prototype models used by the Sisters, though the sniper Sunazara Chimitsu also used one during one of his jobs for Academy City. Unlike production models, the MX kept the original full-auto feature. Another is the Metal Eater M5, an upgraded version used by Academy City during World War III, basically a modified MX with an improved handle and scope plus the addition of a water cooler. One M5 was part of Kuruwa's stash of weapons, and it was used by Hamazura Shiage in the battle with Silvercross Alpha's powered suits.
Powers and Stats
Tier: At least 9-A
Name: Metal Eater Series
Origin: To Aru Majutsu No Index
Classification: Anti-tank automatic sniper rifle
Powers and Abilities: Fires a high-velocity projectile
Attack Potency: At least Small Building level (Capable of blowing up a tank from 2000 meters away, can punch straight through a military powered suit, Sunazara Chimitsu used one to collapse several overpasses)
Speed: Supersonic+ (3070 km/h)
Range: At least 2 kilometers
Weaknesses: Has a lot of recoil, which can hurt inexperienced users