The Millennium Falcon have a fire arc ... the turret rule says, its primary wepon can ignore the fire arc, the fire arc is still there, pointig forward (and used for missiles)
Turret Primary Weapon: Each ship in this pack uses a turret as its primary weapon. Thus, each Ship card shows the TURRET PRIMARY WEAPON icon, and each ship token shows a circular red arrow as a reminder. (new symbol)
When attacking with the turret primary weapon, a ship may target an enemy ship inside or outside its firing arc. When attacking with a secondary weapon, the ship must still target a ship inside its firing arc, unless specified otherwise on the Upgrade card.