Follow the attached below to a pic of the barrel end. It must be some sort of an accuracy enhancement? When I run patch down to the end, I can feel a "ring" were the barrel gets larger
The screws were tightened with a torque wrench by a fellow shooter who also shoots Anschutz rifles.
http://i977.photobucket.com/albums/...tryq.jpg?1472495732398&1472495732681