Replacement bolt buffer rod for all models of the Ruger 10/22.

Can be printed in a variety of materials, I recommend something strong but with some flexibility, like TPU or ninjaflex.

Relieves strain on the rifle and receiver by absorbing the shock of the bolt slamming back under fire. Works quite well and noticeably smooths out shooting.

See this video for installation instructions:

https://www.youtube.com/watch?v=C4PuR5pDCWk