Shin Sung Career 2 707 .22

Hello just picked up a Career 2 707 .22 and it leaks. It has a moderator that is indented where the probe is on it that appears pressed on- will not twist off. I have a Career 2 707 .29 and that barrel has no threads for a moderator that is why I think it is pressed on. Does anyone have any idea how to remove it so I can do a reseal ? Any advise would be appreciated.

Thank you