Lol, take out your bolt guide, take out the two detents, Take off the clamp/bolt/brass thread bearing.
Grab your lighter and a Allen key that will fit through the holes in the clamping feed neck. Warm up the feed neck where it meets the body with your lighter. Waving it on either side of the feed neck. You will see the lock tight begin to weap out of the seem. Now is the time to loosen with your Allen key as a lever.
Some heat on lock tight does amazing things, almost like it was designed that way /facepalm.