Smart watches fart watches. Why would you want to have your email on your wrist when you could have an impossibly badass—and doubtless expensive—analogue sucker made of reclaimed AK-47 steel wrapped around your arm.

Though it's certainly a kickass watch, with a gold rifle-sight inspired frame set inside sapphire crystal, the Inversion Principle Tourbillon is so much more than a timepiece. Like its cousin AK-47 cufflinks, the watch raises money for the righteous destruction of errant rifles in Africa and uses their corpses in its own polished, luxurious form.

Unsurprisingly, the Fonderie 47 Inversion Principle Tourbillon is a limited-run piece. Only 20 are set to be made, ten in 18K rose gold, ten in 18K white. As for straps, you've got a choice of brown or black alligator leather. Price? A cool $350,000. You'd be better off melting your own pile of AKs. But good luck making it look half as awesome. [Fonderie 47 via Born Rich]