Pen Crossbow

thingiverse

Simple 3D Printed crossbow with no additional hardware required except fishing line/string. Designed to shoot standard ballpoint pens and pencils. Print 2 arms and 2 pegs and one of everything else. The arms are held in place with the wedge and the pegs hold the trigger and the string hook in place. Everything is press-fit. The strength of the bow can be adjusted by changing the length of the string, but at a draw length of roughly 70mm it will fire a pen across the room.