Thought I would add some more ideas for the Ash Waste Nomad leader. I also have some torn up Space marine rhino and Imperial guard Leman russ parts which may become a heavy tracked trike for the rest of the gang. Maybe an added platform to allow a friend to hop aboard.
The gang would likely use it to lift heavy crates and for extra muscle during shady deals. I am thinking maybe a heavy weapon of some kind (bolter/autogun/grenade launcher/rivet gun) and a heavy claw for lifting objects. What I do have is some peices from an old Imperial guard walker, some heavy weapon bits and some ork heavy weapons which will surfice.
Now obviously it would be an amalgamation of scrap found at the bottom of the hive.