Well if you are happy with it than go shoot the heck out of it and have fun.
Is that a serial number on the barrel chamber that can just be seen in your photo? There was a NM 7790429, NM7790313, and NM 7791414. They weren't GI replacement barrels, but purpose built NM barrels with enough extra metal to allow custom fitting. If that is a serial number it has already been fitted to a previous match pistol.Yeah its a 779 replacement barrel