Investor Elon Musk's company is selling $500 flamethrowers!

Demand is already high.

Musk said on Twitter early Sunday $2,000 flamethrowers have already been pre-ordered.

He plans to cap sales at 20,000 units.

The Boring Company -- founded by Musk -- is focused on tunnel construction.

Selling flamethrowers is just one way it has been raising money to fund operations.

The company claims it's the "World's safest flamethrower" -- and "Guaranteed to liven up any party."

Just in case things get too lively, the company also has fire extinguisher's for sale for $30.