Although they are listed within the data tre file, hence they show up in the editors, they are not a part of the working weapons tagged for SO. You can place them onto a ship with the editor, but they will not function normally, sometimes not at all, either no visual element or sound or both. You can even allocate settings in the editor such as damage rating, speed etc, but they do nothing. SO is different than WCP, where there are a few non-standard weapons in the WCP editors that will actually work, such as the "unknown 1" gun.
RFB