Awesome tank! Must've taken you a long time to complete it huh? I think it can be improved if you have assigned a material to the faces. Try using Indigo Renderer trial version. It can produce greater realism!
Anyway, keep it up!
What do you think about mine? Mine are used with indigo renderer. I only have 6 deviants (:
Rather than seeing this as a rail gun, I like to image it's more a a molecular pulse cannon. Don't ask for the science behind it
My idea is that it supercharges the electrons in the target so that they "spin out" over-accelerating to the point the structure of the element breaks down and melts/erodes. It can bore through steel and concrete like butter. Woe to the infantryman who stumbles into the nearly invisible beam because his helmet would instantly fuse with his super-heated skull in the same millisecond that his brain boiled and erupted out his face. Eww!