Musk, who tweeted that there are 20,000 units, has been giving a timeline of the sales.

1,000 ordered already, only 19,000 left!

— Elon Musk (@elonmusk) January 28, 2018

10k

— Elon Musk (@elonmusk) January 29, 2018

The profits of the amount sold don't include the potential numbers from fire extinguisher sales.

Don’t do this. Also, I want to be clear that a flamethrower is a super terrible idea. Definitely don’t buy one. Unless you like fun.

A post shared by Elon Musk (@elonmusk) on Jan 27, 2018 at 5:29pm PST

The Bureau of Alcohol, Tobacco, Firearms and Explosives does not regulate domestic production and possession of flamethrowers, the ATF said in a statement to ABC News.

California requires residents to have a permit for possession of a flamethrower.

However, Maryland outlawed flamethrowers, where they are considered a \"destructive device.\"

When Musk was asked on Twitter about the product's legality, he said: \"ATF says any flamethrower with a flame shorter than 10 ft is A-ok.\" The company said in a statement that its product is shorter than 10 feet.

ATF says any flamethrower with a flame shorter than 10 ft is A-ok. Our design is max fun for least danger. I’d be way more scared of a steak knife.

— Elon Musk (@elonmusk) January 28, 2018

But Musk posted on Instagram: \"Don’t do this. Also, I want to be clear that a flamethrower is a super terrible idea. Definitely don’t buy one. Unless you like fun.\"

And then on Twitter, he said his company's flamethrower was the \"world's safest.\"

Great for roasting nuts ?? ??

A post shared by Elon Musk (@elonmusk) on Jan 27, 2018 at 4:53pm PST

Boring will ship flamethrowers out in the spring, according to their website.

The idea of Musk selling flamethrowers seemed to originate when he promised his Twitter followers he would do so if Boring sold 50,000 hats.

After 50k hats, we will start selling The Boring Company flamethrower

— Elon Musk (@elonmusk) December 11, 2017

The Boring Company is primarily an infrastructure company that Musk started as part of his vision to elevate traffic in congested cities, like the Los Angeles area, by building underground tunnels.

Musk has filed a permit to dig a tunnel within Los Angeles city limits in Nov. 2017.

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