A very crude and simple reproduction of a crossbow illustrated in The Book of the Crossbow.
This crossbow was one of the earliest repeating weapons. By cranking the cocking handle rapidly back and forth, a stream of crossbow bolts are fired.
Construction is extremely crude - the stock ("tiller") is laminated from plywood.
The bow ("prod") is made from a single piece of ash. It's a flat bow, curved only by tension in the bowstring. The design of crossbow really needs a steam-bent bow with a little more curve to it, to reduce tension (and thus friction) when the bow is uncocked and the magazine is sliding forwards. I know very little about bowmaking and this is the least effective part of this crossbow.
The bowstring is several loops of Kevlar bowstring, a loosely-twisted waxed roving. To resist wear, the central section is served with a wrapping of more bowstring.
Bolts are cheap chopsticks, either bamboo or plastic. They're cheap and disposable! Despite the very poor bow I'm using, it still has enough energy to shatter a plastic chopstick.
The crossbow is a manually-cranked repeater. A large handle on the top is racked back and forth. Bolts are fired from the box magazine, which holds up to a dozen.
There is no manual trigger mechanism. As soon as the action is fully cocked ("in battery"), the nut fires automatically.