I haven't really started doing any building on the Rhal Kutrie yet, but I have received the 3D print of the 3D model I made of the rifle. The heavy particle battery rifle was intended to be a bulky blockish power house particle cannon that will compliment the design of the Rhal Kutrie nicely IMO. Here is a photomanipulated mock up I did with the rifle being held by a Zaku Cannon I had handy.
Now to start off with, the rifle isn't perfectly 100% as smooth as it needs to be for a cast, so I will probably end up casting this prototype first, cleaning up the cast from that, and then casting that cast again for a more perfect version that will be sellable. Here are some more photos of the actual part without manipulation.