Wolff Extra Power Recoil Spring 18LB for S&W 3904/5904 Series 9mm 47418 Cylinder Part number: 425500000

Part number: 425500000

This part fits both K Frame (

These grips will NOT fit square butt frames

ADJ Rear Sight Body Plunger Spring (2) — for models with adjustable rear sights only

Eliminates grip panel rattle and loosening under recoil

Wolff Extra Power Recoil Spring 18LB for S&W 3904/5904 Series 9mm 47418 Cylinder Part number: 425500000Wolff 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 &