paints 
The gun came in several parts: tires, shield, gun, and legs.
I painted the all the parts with Chameleon Green, then gave it a wash with GW Green Ink. Next, I went over the high points with the Chameleon Green. The last step was drybrushing it with Sickly Green, and painting the tires black.
The pieces assembled together easily. However, I was not sure if the shield was meant to slope back or be straight up and down.