This spring was a definite improvement over the stock spring in my R1.  Compared to other 1911's I had handled and fired, the grip safety on mine was not up to snuff (the stock spring was way too soft).  This spring dropped right in with a drastic improvement to the tension applied by the spring to the grip safety.  Disconnector seems to have a little better tension as well.  Sear resets and functions cleanly everytime.
200 rounds since I replaced it and I am really happy I changed to this one.  More good advice from John H
 From: tonykonovaloff@hotmail.com  |  Date: 12/9/2012 7:07 PM 
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