Matthew Davis’ Arcus is officially the most impressive thing we’ve ever seen come out of a 3D printer. Sure, cheap prosthetics and replacement body parts are important uses of the technology, but this spinning rubber band blaster is what finally makes us want to put a 3D printer on our desks.

https://www.youtube.com/watch?v=r8PtwqRvVDU

Unlike most rubber band blasters that only fire a single shot every time you squeeze the trigger or require a drive mechanism to make them fully automatic, Davis’ Arcus uses the energy from the loaded elastics to spin the barrel and automatically fire shot after shot until it’s empty. Brilliant.

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