I have 2 Norinco 1911s. I have reworked both extensively. I did have a problem with one of them. The tolerences were off and the barrel lugs did not mate well with the lugs in the slide and rounded off in front pretty badly. After a lot of measuring, and discussion with people who knew more than I did, I replaced it with a Springfield barrel I got from a gunsmith. I have shot it several hundred rounds since and everything appears to be okay. I like them.