It works the exact same way as the DBF. it has the same Hydrogen tank reload. it is just smaller then the DBF.
To use you need to have some sort of protechtion against the intence heat. It is a very good side arm and can be very good to stop enemies. Its small size makes it easier to hide.
After watching Aliens and thinking about the effective flamethrowers in the film, the creator of GAO was looking at a nerf pistol and thought wouldent it be great if pistols met flamethrowers.