Citadel Arms Trakr Recoil Buffers by Fungoola. They're the BEST, for a reason.

For detailed information on the installation, select this link;
https://rumble.com/v2nthqo-decellerator-recoil-buffer-for-citadel-arms-trakr-by-fungoola.html
or
https://www.youtube.com/watch?v=izZtC6kU4Jo
The Recoil Buffer in your factory rifle is made of rock hard plastic. Its a joke even calling it a buffer. It should really be called a bolt stop. If you need or want to replace the one in your rifle, you will have to send your rifle back to the factory, at your expense. That makes for a really expensive piece of hard plastic. The Fungoola Decellerator Recoil Buffers are game changers, they take the shock out of the experience, allowing faster return to target, and a much more enjoyable shooting experience, especially for the younger, smaller folks.