The M16A1 is an iconic gun, so it's no surprise that our favorite weapons designer Joerg Sprave fancied the idea of using one as the base of a crossbow. The result is rather terrifying.

Using a kit supplied by PSE, a crossbow maker, it's possible to repurpose an M16A1 in such a way that it fires not Oreos, elastic bands or toilet brushes, but cold, hard arrows. This thing is, perhaps understandably, terrifyingly powerful—and unnervingly quiet. It fires with so much force that that it splits the shaft of the arrow as it hits Joerg's oak board. Watch the video to find out more.