Yes he also mentioned red loctite. Because of the small shoulder and guarantees it'll stay put. He's done other barrels with small shoulders and had no issues I guess. So we'll see. Again he said he'll get it to work one way or another. This place comes highly recommended by the gun shops near me. And with 8 gunsmiths on hand I'm sure they can figure it out. Again it's my favorite gun and never having gunsmithing done before it's still a little nerve racking. I have more confidence in him after talking with him again on Monday. So we'll just see what happens. They are backed up so it might be 3 weeks until he gets to it.