The Type-310 Assault Rifle was a scaled up version of the primarily Imperially used Type-300 SOIWS produced by the Mikaru Corporation. Despite the success of the Type-300 SOIWS the Empire forbade the Mikaru Corporation from publicly advertising the unit, as per contract, to keep its origin and use secret. So, the Mikaru Corporation Weapon Design Collective took the basic concept of the Type-300, and upscaled it into a larger, tougher, and more robust weapon able to be used in more rough conditions and free of contract stipulations from the Empire.