Part# 47420 Wolff GunSprings for Smith & Wesson Pistol
3904/5904 9MM, XP RECOIL SPRING 20LB and Firing Pin Spring
Models : 39, 439, 539 ,639, 3904, 3906, 3944, 3946, 9mm
59, 459, 559, 659, 5903, 5904, 5906, 9mm
5923, 5924, 5926, 5943, 5944, 5946, 9mm