Whenever you press the Aim button, the weapon's barrel changes instead of aiming. Smoothbore Barrel: Hammer Fires Kuiper Shells from the Smoothbore Barrel at the top of the gun. Rifled Barrel: Anvil Fires Gyrojet Explosive Rounds from the Rifled Barrel at the bottom of the gun. Gyrojet Explosive Rounds last for a certain duration, and when detonated in midair, they fire Guided Explosive Rounds from the detonated location. Guided Explosive Rounds are fired in numbers proportional to Shell Capacity, detonating and causing Multi-Hits. The damage of Guided Explosive Rounds increases the more targets are hit when detonating against multiple targets.