A variety of Turret Gun concept explorations, created for an unreleased game set in a post-apocalyptic desert world. They were intended for use on the 'Landship' vehicle design linked below:
https://www.artstation.com/artwork/o2YaBJ
https://www.artstation.com/artwork/Pexdny
https://www.artstation.com/artwork/d0Dz3A
https://www.artstation.com/artwork/X18KkD
Sketch exploration breakdown video