That was quick: Elon Musk sold out all his totally serious flamethrowers in five days.

Last weekend, Musk opened up pre-orders for 20,000 flamethrowers on The Boring Company’s website. The flamethrowers cost $500, and the flamethrowers netted Musk — whose net worth is $21 billion, according to Forbes — $10 million more.

After he sold out, Musk announced that all flamethrower pre-orders will come with a complimentary fire extinguisher, courtesy of The Boring Co.

Get tech news in your inbox weekday mornings. Sign up for the free Good Morning Silicon Valley newsletter.

Musk and his legions are still chortling over the idea of selling flamethrowers online — but some politicians are not laughing.

California Assemblyman Miguel Santiago, D-Los Angeles, has made resisting Musk’s flamethrower sale a personal mission. Santiago plans to introduce legislation to ban flamethrowers and other large blowtorches from being sold in California.

Santiago said he became outraged by Musk selling flamethrowers after reading an article from this news organization on the topic while stuck in Los Angeles traffic.

“I honestly thought it was a joke when the article was read to me,” said Santiago. “Joke or not, this subject matter, in the wake of the state’s deadliest wildfires in history, is incredibly insensitive, dangerous, and most definitely not funny. Absolutely no public good could come from the sale of this tool.”

A spokesperson for The Boring Co. told this news organization Sunday that the flamethrowers could be sold without needing a permit from the California Fire Marshal because the flames emit less than 10 feet.

California and Maryland are the only two states in the nation with regulations against owning a flamethrower.

In the United Kingdom, the Home Office — a government ministry responsible for internal affairs and security in the country — warned that flamethrowers are prohibited and that it is illegal for those under 18 to buy any “imitation firearm,” according to the Guardian.

Musk said in a tweet Thursday that the 20,000 flamethrowers will have a serial number from 1 to 20,000 to commemorate their exclusivity. The flamethrower will be shipped in spring, according to The Boring Co.

Keeping up the levity, Musk said he was considering a different thrower.

“A snowthrower would be really fun,” tweeted Musk in response to an Australian who requested a snowthrower to cool down in his home country.

Photo: Tesla CEO Elon Musk, center, with CTO J.B. Straubel, left, and Chief Designer Franz von Holzhausen as the company launched the Model S at its factory in Fremont on June 22, 2012. (Patrick Tehan/Mercury News)

Tags: elon musk, Flamethrower, The Boring Company