I've got the locking ring off and the handguard off, but the barrel nut is still attached to the forearm adapter. Inside the barrel nut, there's 4 very shallow, semi-circular longitudinal grooves...guess some kind of special tool fits in those grooves? Any MacGyver solutions to removing it?
Do I even need to remove it as I'm looking at a carbine FF handguard, do these havea standard thread?
Do I even need to remove it as I'm looking at a carbine FF handguard, do these havea standard thread?


















































