I resized the original laser cut crossbow to for 3D printing and fit onto a 200x200 print bed.
I added and changed a few things to make it easier to put together. So you might have to superglue the end on.
If you bent the "firing pin" or the bit that holds the rubber band... I have put a notch in the bottom barrel and you can put a second rubber band from the notch to the upgraded trigger.
The printed dart is about 9.3mm which is an odd size, thus the printed dart.
Sorry the size seems a little tight on most parts, so take some time to check each part before you try to force it together. I had to file all my slots a little.
My re design requires:
3x 2mm x 15 or 20mm screw/bolts
3x 2mm nylock nuts
For the Dart file: The slicer i am using does ask if about scaling and imperial,,, if you get this say No.
Some sanding and re drilling of holes maybe required.