A robot tank that reuses an existing and very cool articulated print-in place tank tread. To make the tank, print two of the tread assemblies (found here →Fully Printable Tank Tread Assembly by Laird Popkin | Download free STL model | Printables.com.) Then print one tank body, and one tank barrel (shortened from picture due to small print volume on MK4s). Glue the tank treads into the tank body (they mate with just a little clearance so you can put the parts together). Then optionally glue the barrel in place. If you don't glue the barrel, it will be a removable barrel, and the 20mm receptacle can be used for any other accessory you can think of.
Paint the dome on the tank body a nice offsetting color to make it look like the eyeball nest for the robot.
The author remixed this model.
Print two of the original tank tread assemblies (no changes at all). The toy tank leverages the Fully Printable Tank Tread Assembly 100% with no changes to it. The toy tank adds two more parts to make a fun tank toy.