More done. Don't think i'm too far off now. Not entirely sure about the gun, but it shows one of my ideas. The other idea is to have the gun slung under the arm on a bracer mount. I'd still want the two cables running into a backpack.
In the photos the gun looks even more massive than in my hand. The cables are also huge. The cables on a final weapon would be thinner than this, most likely guitar wire. Any suggestions on weapons that I could get that would look more the right sort of size?