I acquired yesterday from the Aetherbay an awesome gun stock made from wood/solid metal. It was apparently custom modified by a guy who used to build crossbows and you can certainly tell from it's design.

I've also acquired a 34" brass hunting horn. Im thinking of combining them like the pic below. That's as far as my ideas have got at the moment, though I'd like a hand grip towards the front which would add to the crosbow look.

I really need to do the stock justice. Any help / suggestions are more than welcome.
I have a few other ideas for it too such as installing an electronic whistle (120db) and a laser hooked up to a trigger

My girlfriend reckons the metal on the stock looks like the back of a dragon with the trigger guard looking like a claw. As such I'm not sure whether the design should be sci-fi or go down the more organic route.