The X15 and XM42 are personally owned flamethrowers that are shockingly awesome!
The performance of these two flamethrowers are freakishly cool. The flames reach between 10 and 25 feet depending on the model that you get. Using liquid fuel, you can launch flames straight ahead and toast your targets like marshmallows.
California and Maryland, sorry guys, the fun is not legal there.
FPS Russia, has some fun targets including a wooden fence, and a target covered in $400 worth of fireworks. Finishing the video with 80lbs of Tannerite is overkill, but I would expect nothing less. The Tannerite literally burns through a car. The Napalm in both of these flamethrowers is the secret ingredient that keeps the flame going after making contact.
As usual the safety precautions have been exercised and the proper flame retardant materials were used. Do not try this at home because it will surely earn you a public nuisance report by the police.
Stay safe, enjoy the flamethrowers, and play with these under the safest conditions.