The winged cone for blowgun darts is made for blowguns in caliber .625 (like the big bore from Cold Steel).
The wings should force the dart in a little rotation in order to stabilize the flight and increase accuracy.
You may need a bit glue to hold the dart.
Using PLA the printed quality wasn't convincing. Might be better with such a resin printer.
Imagine those long wings in sharpened aluminium....
The author hasn't provided the model origin yet.