I'm thinking maybe you mean the barrel won't slip easily into the bushing.....if you take the barrel and insert it into the end of the slide (where the bullet comes out), does it move freely through the bushing? If so, all you need to do is tap the barrel into the bushing, just like you were assembling it normally but with a little help. I have a bushing in one CZ that I had to do that to, the gun is very accurate, due to the tight tolerance between the barrel and bushing. It functions smoothly with no issues....I actually leave the barrel in while cleaning the gun, not a big deal, after several hundred rounds the bushings inside diameter will enlarge enough to remove the barrel easily enough.