How to Make Modded (metal Tip) Nerf Bullets : 3 Steps - Instructables
Free STL file NERF Darts - Custom Tips・3D printing model to download • Cults
Extra-Loud Nerf Mega Dart Tips: Mega Bang Cap Darts #3DPrinting #3DThursday « Adafruit Industries – Makers, hackers, artists, designers and engineers!
Apparently there's a big difference in quality of dart tips. Left is Nerf brand, right is Raytheon and middle is (I'm not sure. Cause girlfriend bought them years ago.) : r/Nerf