|They must use it at other places because it's on a trailer, but the wheels are chained and locked together.|
|If you look close, there's a pile of wood at the back of the pistol grip.|
The firebox is in the pistol grip and it is wood-fired.
|The grill is in the cylinder of the gun and the smoke comes out the barrel.|
Hope these pictures provide enough info to get an idea how to build one.