Though the sketch names this ship a "freighter" and the concept also talks about a cargo pod, I think that according to the cockpit size this is more a heavy fighter/bomber. More like a raider as the Sorthak with its own jump drive (could fit into the massive hull) and enough weapons to make big damage. Below the cockpit are the torpedo tubes, while the wings store the antifighter missiles.
I'm still not happy with some detail and some proportions, I had especially big problems with the wings, since currently left and right are the same (also I think the hand drawn perspective in the concept art is not fully correct), so theoretically the wing should be OK. It looks good this way, but maybe more asymetric wings would also be neat. Here are the images.
I found this baby here I made a few months back in a final attempt to going back to modeling. But I think it would be a shame to waste the model file and the time I put into it, so I decided to upload it here, maybe someone can use it in a mod or something. Sorry it's not textured, but creating texture files is not really my strength. Hope you like it.