I have a bunch of parts that I got just before everything went nuts, so I started building. I noticed that my lower is too tight so I backed off the jam ring on the barrel nut. Which created another problem. Now when I thread on the handguard, there is a gap between the barrel nut jam ring/handguard and the lower. I was thinking about sanding down the take down pin pocket on the lower. That seems to be what is causing the issue. Anyone got any ideas how to move forward?