So are you having difficulty getting the barrel nut off the barrel (as in your first post) or are you having difficulty getting the barrel nut out of the handguard (as in your second post)?I've installed one of these handguards and don't recall having any issues removing the special barrel nut from the handguard to get ready for the install. There are some teeth (4 it think) on the back of the handguard that mesh with the scallops on the nut to stop it from rotating. There are also 2 bolts on the bottom of the handguard that fix the handguard to the nut (these of course need to be loosened).