The world’s smallest legit crossbow?

The team here at The Slingshot Channel wanted to make another small crossbow, after all these looong weapons we recently presented. The challenge: The smallest possible encapsulated (=safe) crossbow for 20“ 2219 crossbow arrows. That’s right, arrows, not bolts. (The difference: Arrows have fletching.) In Terry Pratchet’s “Discworld“ novels, there is a weapon he calls the “Spring-Gonne“. Basically a length of steel tube with a spring that shoots steel bolts. Highly illegal in that universe! We wanted to ma