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.
Now available: Explosive Tips for your MEGA Nerf Darts: http://www.thingiverse.com/thing:2156994
For instructions and testing results, please view the video at: https://youtu.be/stezC9FAD3E
Print Settings with the tip down/screw up:
Layer Height: 0.2mm
Wall Width: 0.4mm
Wall Count: 3
Top/Bottom Layers: 6
And, for the best quality results with quick cleanup:
Support Pattern: Zig Zag (connected)
Support Density: 15%
Support Z Distance: 0.4mm
Support X/Y Distance: 0.7mm
Carefully remove the tip from a standard Nerf bullet/foam dart (the generic versions are usually easier to pull apart than genuine Nerf darts). Screw in the tip you printed. Slip a "Party Snap" into the hole. Load the dart and fire!
Check the YouTube video for more instructions and the testing results of the Nerf Explosive Tips!