Have an AR rifle or pistol with a standard buffer tube? Have a CMMG 22lr conversion that you want to run perfectly? Tried to get the Rare Breed Forced Reset Trigger FRT to work with 22lr and didn't have any luck? I spent months monkeying with it until I finally designed and printed this.

Take out the buffer and buffer spring. Leave the tube on, leave the retaining pins and springs in. Stick this inside your buffer tube. Boom. You're good to go.