what weight recoil spring does a .40 sig 226 use?

[The Cocker]

Couldn't find it with a google search. Planning on putting in wolf or ISMI springs in my Norinco NP-58 when it comes.

 

[rcoville]

According to Wollf, factory standard is 20 lb.

http://www.gunsprings.com/Semi-Auto%20Pistols/SIG-SAUER%20%28SIGARMS%29/P-226/cID1/mID4/dID254