The original plunger from the Retaliator of my young son broke and the Nerf wasn't usable anymore. The front part broke end the o-ring didn't stay in place anymore.
Sadly I didn't find a already existing model fpr a sparepart, so I decided to make my own one.
This was the second model I created in thinkercad so far, and I was absolutely happy that it finaly worked so great and did bring the already dead Nerf gun back to life!
It works for about two weeks now, hopefully for the next years :).
My son is quite happy too!