Summary

Gwaa Tank.
Print: Body, Wheelx4, door03, barrel (you may select which barrel you like).

Other material: 384 barring X 8, wheel tire, M3 X 60 screw x 5, M3 X 30 screw X 2, M3 X 25 screw X 1, M3 nut X 8

Buy 4 nos. of model wheel and take out the tire. Install the tire into the printed wheels.
Press the barrings into the printed wheels.