You still have your termanology mixed up. Reading your posts I sometimes think you are describing the spring for the Double Action Sear and at other times the Mainspring. There is a big difference between the two, in fact the Mainspring is a Leaf Spring and the DA Sear Spring is a coil Spring.
Note, the above are all ribbed Mainsprings made by Wolff, unfortunately the factory Mainsprings appear to be out of stock at this time. Based on personal experience I would suggest getting the full power spring and file fit the Strain screw about 0.015-0.020 shorter than original new length. That should yield a DA trigger weight in the 9.5-10.5 lbs range with 100% perfect reliability.
Having changed out that little bugger I can understand why yours was broken, they are a real challenge to fish out. Tip on that particular, use an Exacto knife to "walk" the spring out of the hole one coil at a time. once you have it completely clear slide the Exacto knife under the spring and the DA Sear will slide right out.
BTW, I tried to find this spring on Numrich's web site with no luck at all. Unfortunately they do not have their site set up to allow searching by the factory part number. If you need to get this spring sooner than what S&W indicated it may be worthwhile to call them up on their land line. I've found parts at Numrich's that were out of stock everywhere else.
Need a MIM sear spring for a 629-6
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Linear Mode
