Ruger PC Carbine / Charger Bolt Buffer pad for the TandemKross buffer upgrade,
The pad wears out, and you can't purchase it separately.
TPU, you can experiment with your own density's as far as infil, walls etc.
i have 2 walls, 4 top/bottom, 20% honeycomb infill. will test the longevity in the future.
The author marked this model as their own original creation.