Captured Rail Gun *Early WIP Again*

I wanted to combine the separate pictures before doing anything and come up with the story. Story is that America never came to the aid of France or England during WW1. And because of this, Germany's offensive started in late 1917 and was pushing the Allies back. While the Allies were on the retreat, the had to leave the majority of their equipment. Including this rail gun that was captured and later used by the Germans. So, tell me what you think.