The new factory extractor spring I have on hand has an OAL of .4105" .
It is for the "Ranch Rifle" versions and may or may not be the same as was used in the Pre-Ranch models, I don't remember.
Also note that the ends of the factory spring are "semi ground", not "fully ground", so be careful exactly where/how you measure it or your reading will be off a couple of hairs.
Hope this helped.
DGW
