Liberty ROGUES can produce these now. And they need nomad parts to do it.
True, but I think the difference between the two is that the cloaks and Jump Drives and Sensors all had blueprints, and were in R&D on a larger scale. These codenames were secretive things that few people knew of, and knowledge of them died along with the wreck.
If people were to develop codenames, it would just be the same as any normal gun, there would be nothing unique about them, they would be mass produceable given the materials were available, unlike codenames.