Based on this illustration from the
Phantasy Star III manual, we can surmise that the guns used in the game were not variations of pistols or rifles as in so many science fiction stories featuring advanced technology. Instead, they were arm mounted cannons. A very faint sketch of a user's arm indicates that the gun is attached to the forearm, with a triggering device stretching to the palm of the hand. A hose exits the rear of the weapon's body, perhaps connecting it to instrumentation in the arm or torso of the android carrying the device.