My friend and I decided a long time ago that each squad should get a Chainfist. It never made much sense that only squad had one.
The biggest thing I did with this guy was make his Chainfist look like it's been used.
I didn't want to paint it a different color to do that. I figured I could just make it look beat up and it'd give him some character.
Additional links:
• The first 5-man Deathwing squad
• Project link: Rebuilding my Deathwing