HsMLR-05

The, also known as the Meteor Shower (メテオシャワー), is a developed by Academy City.

Principles
The Meteor Shower is a, a military vehicle with excavator-style treads and a huge container on its back, seven meters long and weighs over 25 tons. The raised launch container fires 12 giant rockets, which then scatter around 700 bomblets per rocket, spread over 8000 bombs in total over a wide area, enough to wipe out an enemy ground force at the touch of a button. It is apparently 99.99% accurate, and can be fired on a timer.

In certain cases, such as with the Meteor Shower acquired by Frenda Seivelun, the weapon can be overloaded to a degree to fire more targets (in Frenda's case, at least 10,000 targets launched).

Background
The exact time of the Meteor Shower's development is unknown but units were operational at least one year prior to the main story and simple enough to be supplied to Academy City's external cooperative institutions.

Honey Queen Arc
On August 6th one year prior to the main story, Item made use of a Meteor Shower which Frenda Seivelun had acquired to launch a saturation attack with Frenda-original explosives to keep the defenses of the Meltdowner research lab occupied and cover them as they attempted to break into the lab ahead of Honey Queen.

Trivia

 * Going by the patterns for Academy City's weapon naming schemes, as well as how it is described, likely stands for.
 * While a multiple rocket launcher is usually referred to by the acronym, the acronym (meaning Multiple Launch Rocket System) has also been used.