This is a plastic version of a nerf streamline dart
UPDATE: Have altered the dimensions a bit. It now fits inside my modified Nerf Maverick (no air restrictors). It fits and fires, but doesn't shoot quite as far as i'd like as i think its a little bit heavy and lets quite a bit of air out the sides. I'll update and make it a slight bit larger radius soon and it should fit in snug and get decent power.
Print settings that i tried-
Layer Height: 0.3mm
This is the first 3D thing i have tried designing and I havent tested the dart yet so im unsure if it actually works. Could be fired out of a Nerf Maverick, or any other gun that accepts streamline darts.
Disclaimer: Please do not fire this at anyone, if it works it could really hurt