Sub-Machine Guns are useful light firearms that pack a punch through automatic fire, often used by the Hacker & the Soldier. Sub-Machine Guns have the unique benefit of Armor Shredding. This means that every round fired will ruin the target's armor. Enough constant fire can completely undo all the protection that the target's armor offers.
Fast firearms that release bursts of fire. Difficult to aim, but many rounds mean many chances to hit.
Modified to fire longer bursts. Even harder to aim than Basics, but also more deadly.
Fewer rounds are fired, therefore fewer rounds connect, but each are more accurate & more damaging than others of their class.