Browningautorifle: I wouldn't hesitate to shoot original GI carbines
From a pure strength standpoint they are probably better than these modern made units. The receiver is not much of a problem part, extractors, slides, barrels all wear out. But they would wear just as bad on one of these put together units made by James River. A 68 year old weapon is just as good as when it was made and the US Government made very sure that all parts were made of the correct steel and to exact tolerances. I doubt if the same thing can be said for some put together unit using used parts of varying quality. They may look beautiful but that isn't a guarantee that they are up to par with the genuine article.