For some added explosive fun during your next Nerf War, I've made a 3D printable replacement tip for foam darts that holds "party snaps" that explode on impact!
The tips are made to leave about 1-2mm of the "party snap" exposed at the tip while holding the snap securely for active Nerf play. I've tested the darts up to 50 feet away from a smooth surface (garage door) and they still explode on impact. I've tested well over a hundred rounds and haven't had a single jam as the tip fits perfectly with the foam dart.
Disclaimer: I ADVISE THAT YOU DO NOT SHOOT THESE AT PEOPLE OR ANIMALS
I tested these with PLA, PETG, and TouchInk (a semi-flexible filament) and the best results were with PLA.
For instructions and testing results, please view the video at: https://youtu.be/stezC9FAD3E