MA3A assault rifle
From Halopedia, the Halo wiki
The MA3A Individual Combat Weapon System is an assault rifle in Misriah Armory's MA series, presumably a variant of the MA3.[note 1] It was the predecessor of the MA5B Individual Combat Weapon System used by the UNSC Marine Corps and the UNSC Navy. The weapon became obsolete when the MA5B was introduced, as the MA5B is capable of being stripped down and reconfigured for specific situations.
As of 2552, production of the MA3A had ceased, though it was common on the black market and was favored among terrorist organizations. The Insurrectionist guards on Eridanus Secundus were armed with MA3As, which replaced the HMG-38s they had previously used.
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