Arsenal and Gunnery are one of two Ranged DPS disciplines for Mercenaries and Commandos. It is one of 18 different DPS disciplines. It requires an active High Velocity Gas Cylinder or Armor-piercing Cell to use it efficiently. The two support buffs for the raid are Marked and Sundered. Its strength is burst damage.
The discipline revolves around the use of missiles or special cannon ammo to blast their enemies. It is somewhat simpler in theme than the other damage discipline, Innovative Ordnance\Assault Specialist.