This artwork was commissioned by me and drawn by my good friend Nate Welch:
www.instagram.com/nate_welch/
https://www.artstation.com/nate_jw
I have permission to distribute this work.
The left skin is supposed to be an "engineer" setup, with a shoulder-mounted plasma cutter and a wrist-mounted rock saw. The middle skin is standard-issue soldier gear, with a shoulder-mounted pulse rifle and a wrist-mounted combat knife. The right skin is elite combat equipment, with a shoulder-mounted seeker (sniper) rifle and a wrist-mounted plasma saw.