Marlin 60 Recoil Buffers by Fungoola. They're the BEST, for a reason.

For detailed information on the installation, select this link;
https://rumble.com/v2nscm6-marlin-model-60-and-all-variants-drop-in-recoil-buffer.html
or
https://www.youtube.com/watch?v=_J3BcMiUTm0&t=2s
The Recoil Buffer in your factory rifle is old and deteriorating. At some point, usually between 15 and 20 years, they will disintegrate, causing your charging handle to put a nice, deep dent in the receiver of your irreplaceable rifle. The factory no longer supports these rifles, and you have a lot of CHEAP options. None of them are worth using except ours. Highly engineered to provide excellent performance with all pressure rounds, making for a smooth, reliable shooting experience.
Better still, our buffers drop right in!! No need to take the action apart to replace them!!
Also check out these videos on this subject;
https://rumble.com/v4xrc3n-marlin-parts-availability-model-60-buffer-replacement-parts-flying.html
https://www.youtube.com/watch?v=ag_0ygcTPsw