Wolff Extra Power Recoil Spring 18LB for S&W 3904/5904 Series 9mm 47418 Cylinder How to Identify Your Model:

How to Identify Your Model:

These grips will NOT fit square butt frames

45 S&W 45 ACP

Direct replacement for worn factory springs

This part fits both K Frame (

Wolff Extra Power Recoil Spring 18LB for S&W 3904/5904 Series 9mm 47418 Cylinder How to Identify Your Model:Wolff Extra Power Recoil Spring 18LB Premium extra power recoil spring designed specifically for Smith & Wesson 3rd Generation 9mm pistols. This 18 pound spring provides increased reliability with full power loads and ensures positive cycling with factory ammunition. Compatible Models: Smith & Wesson Model 39, 439, 539, 639 Smith & Wesson Model 3904, 3906, 3944, 3946 Smith & Wesson Model 59, 459, 559, 659 Smith & Wesson Model 5903, 5904, 5906 Smith &