If you remove your grip, you’ll see a second threaded hole with a tension adjustment screw in it. It takes an 1/8” Allen wrench. Snug it up until your takedown pin is still able to come out. Be sure to cycle the bolt a few time to check for strikes in the buffer tube. It it’s hitting, loosen the tension a little. Then, reinstall your grip and burn some powder. Sent from my iPad using Tapatalk