I got my first used barrel (20 gauge) today. I was kinda worried it would not fit and I would have to try and fit it. I put it on my frame and it locks up tight as a bank vault. There is no wiggling while it is open or closed. The release button has the rattle when the barrel is closed. I think it is good to go. Should not have any fitting to do. Does everything sound good to you fellows? Gonna go try her out when it quits raining. Thanks to 257man for the barrel.