I am confused. I bought a 22lr revolver a few weeks ago, I needed to lengthen the barrel by about 2 inches so I questioned where by I could purchase a substitute barrel around the manufactures Web site, they mentioned which the gun was registered to me with the atf https://reidfpabi.qowap.com/91118115/5-easy-facts-about-polymer-80-glock-43-complete-kit-described