Tuning Help! Ruger impact max barrel upgrade

Hey all, I recently bought a new Ruger Impact .22 and looking for a little bit more range. I have the older springer version, but recently purchased the gas piston version. Barrels on both are about 14.5". I got a new barrel from Mike at flying dragons that's 19" and crowned. I ran into a problem today removing the new barrel and need some help. The connector to the front of the breech block is different in the new model. And I can't figure out how to remove it. I've attached pics of the connection. Any one removed this? Or have suggestions?
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