Wolff M&P 9/40/357 Reduced Power Recoil Spring 15 LBS - Full Size Only KK22U 44 Magnum revolver barrel compatible

44 Magnum revolver barrel compatible with 629-5 and newer models

Enhance your Smith & Wesson M&P full-size pistol with this premium Wolff 11lb recoil spring

Genuine Smith & Wesson used bolt assembly for the K Frame Model 1905 4th Change

The barrel pin passes through the frame and barrel to secure the barrel in place

Factory OEM Part #391640000

Wolff M&P 9/40/357 Reduced Power Recoil Spring 15 LBS - Full Size Only KK22U 44 Magnum revolver barrel compatiblePremium Reduced Power Recoil Spring for Smith & Wesson M&P Upgrade your full size Smith & Wesson M&P with this precision engineered 15 lb reduced power recoil spring from Wolff Gun Springs, America's trusted spring manufacturer since 1958. Key Features: Reduced Recoil: 15 lb spring weight provides smoother cycling and reduced felt recoil Enhanced Performance: Optimized for competition shooting and range use Premium Quality: Made from high grade chrome