KWA/KSC VZ61 (Part 37)

This is a model of this part (Part 37) but specifically only the rubber piece that breaks/dries out frequently.

Credit for this model is hard to pin down, but this was shared on the HRC Discord by user:sindrathion - No one is taking credit for it but if someone does will update here.

Printing:

This will NOT work in PLA or PLA+. It has been tested with PAHT-CF and PA12-CF and worked to 1000 rnds with no signs of breaking. TPU testing is commencing but no conclusive evidence yet that it will work.

Use a .2mm Layer Height and 100% infill via walls. Slow your layer times down because layer adhesion is your friend here. You may need to file it a bit to get it to fit in, and using a small hammer tap it into place.