Wave 10 - HIDEKI CLASS ATTACK SQUAD - Galor Class Phaser Ban

The 'Galor class phaser bank' upgrade states:
Your ship's Primary Weapon can target ships at Range 1-3 and your Primary Weapon Value is at +1 (max +6)
Does the '(max +6)' denote a max PWV of 6 or a maximum possible upgrade of 6?
Your ship's Primary Weapon can target ships at Range 1-3 and your Primary Weapon Value is at +1 (max +6)
Does the '(max +6)' denote a max PWV of 6 or a maximum possible upgrade of 6?