Have a gun with a Parker style forend. The forend stays put, but giggles side to side one the barrel when attached. The forend will not come off until the lever is pulled. The barrel is tight to the action when the forend is off.

When this kind of issue happens, what is typically the cause. I dealt with this on a Lefever recently that had a moveable wedge and adjustment screw in the forend lump. This gun doesnt have that feature.