Flamethrower Gloves.

[atomic1fire]

Only if the Flamethrower gloves creation involves using science to create a flammable gas mixture, because it's kind of easy to build a standard flamethrower, even if they're a pain to use and kind of complicated.

Also Plasma tank flamethrowers seem kind of out of place when you could add in some kind of gas science and make weak or even stronger flamethrowers.