The M555 Electromagnetic Launcher, more commonly known as a railgun, is a heavy weapon featured in Halo 5: Guardians.[1]

Operational HistoryEdit

Testing and DesignEdit

During it's testing and design phase, it was known as the "X555 Electromagnetic Launcher Advanced Technologies Testbed".[1]


At least one M555 was given to the Liang-Dortmund Corporation. It was used during the Battle of Meridian in late 2558 to defend the town of Meridian Station.[2]


ONI Railgun - A variant of the M555 Elctromagnetic Launcher, where the slugs produce lingering area-of-effect damage.


The railguin can be found in tripod form. Like otherguns, it can be removed from its mount. Picking up the railgun results in a lack of mobility. The gun behaves like the M68 Asynchronous Linear-Induction Motor in previous Halo titles.



  1. 1.0 1.1 1.2 1.3 Halo Waypoint: Universe- Gauss Cannon
  2. Halo 5: Guardians - Level: Glassed

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