Hello,

this is the Buzzards' excavator truck. It has a hydraulic arm with a circular saw at the front and hauls a small excavator on its back.
With this truck the Buzzards attack the War Rig and try to capture it. Their plan fails miserably and the Buzzard Excavator (this truck) spectacularly blows up quite accidentally. While blowing up, the excavator arm breaks one of the War Rig's turrets (the cars welded onto the tanker) away.
I built the War Rig before this incident happened, that's why my War Rig still has all its turrets.

Enjoy!