This is my design for the bolt buffer to be used on AR CMMG .22 bolt conversions with the BoreBuddy bolt weight.

It was designed from the start to be easily printed with in TPU.

I've so far used it in my rifle for few months and substantial amount of ammo.

So far there is absolutely no wear on the components or the buffer itself.

The buffer is very easy to install, simply pull the guide away from the back plate, drop the buffer in place and return the guide.

I assume it would work with PLA or any other material, but it was designed for TPU and I think TPU has the best properties to absorb the impact and not brittle after couple hundred shots.