I don't see any reason why they couldn't be. The turrets can theoretically be rail or coilguns, but that leads to maintenance issues, which is a bit of a problem in spesss.



The internal coilgun can be repaired once it cools down, without having to leave the ship.



The projectiles are probably some fairly advanced bits of tech, since they don't need to worry about penetrating an atmosphere. More payload, or something. I dunno, I just work here. Dr. Banach is the expert, ask her. :u