If you ask me, they should be removed from the mod entirely.
I havent used a single codename in... well, at least a year now - not since 4.84 anyways. Everyone should be using their faction's guns, rather than running around with 'top secret' weapons that mysteriously keep appearing all over sirius.
@Els:
That's the way it should be. A freelancer or merc can always apply to use zoner guns, or IMG guns, or junker guns, you just have to be approved, and most are out to pvpwhore and thus wont be. The way I see it, you're trading in the ships and equipment available to you in exchange for a much larger ZOI and much more freedom.
I do think that corporations should be able to use house weapons belonging to the house they belong in, though. Ageira, for example, should be pink with Liberty Navy/Police on the tech chart, so they can use magma hammers and vengeances, but not liberty naval ships or police ships. Same for other corporations.