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Class 3-E of the Kunugigaoka Junior High School is just your ordinary school classroom with its students of many backgrounds. The only difference between them and the rest of the schools is that they have become a government-contracted killer group to assassinate their one sole target...their homeroom teacher. Koro-sensei, the teacher, is a yellow, octopus-like creature who had destroyed a full 70% of Earth's moon in an instant. He then claims he will do the same to Earth within a year and make an offer to the governments of the world, make him the teacher of Class 3-E while Class 3-E has to kill him within the year limit before he destroys Earth. Koro-sensei has already escaped the governments many attempts to assassinate him due to his various powers, the prominent one being his maximum speed reaching Mach 20, its now only up to what Class 3-E can do to avert the terrible fate that awaits Earth...
The following weapons were used in the anime series Assassination Classroom:
Class 3-E is equipped with BB-shooting M4 Carbine to assassinate Koro-sensei. The M4 is fitted with a full stock, a magpul foregrip, magpul BUIS, and PMAGs. It seems to be called the "Assault Rifle MM".
Machine Guns
M249 Para
An assassin in Episode 4 uses a M249 Para against Koro-sensei.
GE M134 Minigun
An assassin in Episode 4 uses a Minigun against Koro-sensei.
M61 Vulcan
A F-22 sent to hunt Koro-sensei uses its M61 Vulcan to no avail. A assassin in Episode 4 uses one as well on Koro-sensei.
Grenades
Mk. 2 Hand Grenade
Nagisa uses a Mk 2 hand grenade in a suicide-bomb tactic to assassinate Koro-sensei.