Heavy Bolt Fins

I wanted to create a set of printable fins that i could thread a large nail through to create a cheap and easy heavy bolt for target shooting with my slingbow.

The fins are designed to fit over a 5.6mm X 125mm nail.

Annealing the prints (if you use PLA) may help them last longer depending on the target you are using though it's not essential.

Edit: The balance may be a bit off without adding some weight to the front but they work quite well most of the time in testing.

The fins may not be large enough to provide enough aerodynamic resistance but I am limited by the diameter of my launcher.

Feel free to improve on it for your own purposes :)