I'm confused. I bought a 22lr revolver a pair weeks ago, I needed to lengthen the barrel by about 2 inches so I requested wherever I could buy a replacement barrel over the manufactures website, they said the gun was registered to me with the atf with a specific barrel https://glock43xp80frame47776.bcbloggers.com/31073372/the-5-second-trick-for-polymer-80-glock-43-complete-kit