The Void Corps

If the player has Void Core Assault Rifle or Void Shotgun , whenever one of the guns is held, the others orbit the player. Reloading causes the orbiting gun(s) to fire towards the crosshair. If the player has all three guns, the guns that aren't being used will orbit the player. This does not consume ammo from the orbiting guns. If the player uses Duct Tape to attach a gun to one of the gun(s) that orbit, the orbiting gun will fire shots from both the original gun and the one taped to it.