Both springs are a little different from the mil spec springs. They have slightly different bends in them.
We would also recommend Moly Slide paste for the sear surface of the hammer if you don't already have some. These trigger groups must be lubricated with Moly Slide to work properly. One little jar will last 3 lifetimes. You can order springs, triggers and other parts by calling us at 1-800-883-6229 and order what you need.