Now take a look. All houses (Corsairs and Outcasts included, they are houses too) has two types of guns (somehow the Order get's here, but it's single player canon).All smaller pirate factions like Rogues, who are not powerful in military terms, not well organised do not have any chance in developing second gun. But here is a plus. Pirates has allies and thy can use their weapons of course with the limit of RP (full kraken werewolf.. well wouldn't look cool).
We should keep diversity. ANd littiel factions should keep one gun. Besides you already have two guns. A shield buster + your own pirate facton gun. Just like Corsairs (We can't use civilian stuff) Pulse + neutron gun (all guns which are non corsair, but allied to us, are white in tech chart)
Whats the problem? If it is about shield, perhaps we should remove the shield dmg bonus and reduction of pulses depending on shield type, but this is all the diffrent story.