Just finished my most recent commission of 3 Heavy Weapons Stormtrooper Backpacks. The base is a hollow oil pan. The 4 main boxes are vacuum formed ABS from custom molds. The bottom right cone is 3D printed. Upper middle cylinder is an empty wipes container. Right side tube is 2 inch pvc with a 3D printed white control panel. Clips on left side are for holding the E-11 blaster. Antenna is converted from a raptor antenna I get from NAPA. This is about the 20 th of this pack that I have built. Definitely my favorite and very light.