Rail Gun Cannon process

This personal project was inspired by a number of video games (Metal Gear Solid's Metal Gear Rex main Weapon) I have played in the past as well as movies in films
(This is a nod from the movie Transformers: Revenge of The Fallen)

The Final concept of the Rail Gun Cannon

Initial sketches for the Rain Gun Cannons. Note that these just scribbles

Here I chose my Top 3 Rough sketches for the Rail Gun Cannon

Here I decided on the Rail Gun's form