Been there had same issue, the barrel was locked in but button wouldn't come all way out. This drove e nuts so I sent the gun back to SW the turn around was about one week. The button come all way out now when I reassemble the gun. seems they finessed the stud/ball on barrel to fit the slot in the button. I however only break the gun down to clean about 1000 rounds other wise i run a brush and wad thru to clean it.