Thats crazy to hear, as I have never came across someone who had a bad sigma. I guess you can get a lemon from any gin maker though. I have had one in .40 for a bout 5 years and love it! I did have to replace the guide rod and spring because of wear and tear. But S&W did that for free, and went ahead and put a new extractor on it and cleaned it up just because. I have put a thousnds of rounds through it and still love it.
"A free people ought not only to be armed and disciplined but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government."