Registration required? FFL required? Government approval required? I think not... but that fireproof suit looks expensive...
World's First Commercially Available Flamethrower is Here
http://www.shortlist.com/tech/gadgets/worlds-first-commercially-available-flamethrower-is-hereExcerpt:
Well, what could possibly go wrong?
The world's first commercially available handheld flamethrower has been created, and it looks terrifying.
The XM42, made by Ion Productions, can launch flame to a distance of up to eight metres and is readily transportable, with no need for a backpack of fuel. Simply load up the refillable tank with regular, car-ready petrol and away you go.
Chris Bryars of Ion said, "We wanted to bring a device to the market that represents what a real flamethrower should be", while the blurb on the website says that it is a "fun device to enjoy with friends" and ideal for "clearing snow and ice, eliminating weeds, insect control, pyrotechnic event displays and bonfire starting".
Yes, yes that's exactly what people will be using it for.