Back when I worked on firearms I had seen just about every type of extractor fail at one time or another. Rem's little stamped spirng may be cheap but it works about as reliably as any. I believe the biggest advantage of Paul Mausers design is more applicable to the military civilians. What it does that many before it did not, is prevent double loads.. Little spring clips and claws can pull a casse out of a chamber just fine but for the most part thay can not prevent a double feed.