Magna-320 pulse laser
From Halopedia, the Halo wiki
The Magna-320 capital-scale pulse laser is a classification of capital ship laser-based directed energy weaponry developed and employed by the UNSC Navy. The weapon is employed as the secondary armament of the Anlace-class light frigate with four such weapons present on the ship - taking the role typically fulfilled by naval autocannons and naval coilguns.
- Halo Encyclopedia (2022 edition), page 121