Originally Posted by
Caliper
I did replace the springs on a M57. I used the standard Wolf kit, but I don't shoot the gun near as much as you do! I replaced them just because it's a surplus gun and I have no idea how much it was shot in the decades before I got it.
My only comment is that replacing the recoil spring is a PITA. You will have to drive out a tiny pin on the guide rod holding the spring retainer. It's very small and very short and took a bit to line up and get back together after putting in the new spring.