Wolff 17 LB Recoil Spring - S&W 4043/4046 .40 S&W | Part 46917 Magazine Tube The thumbpiece is the lever

The thumbpiece is the lever you press to release the cylinder for loading and unloading

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Some parts may require installation and fitting by a qualified gun smith Factory replacement parts are manufactured to the exact same specifications and tolerances and use the same manufacturing materials as the original parts

and plunger assembly for Smith & Wesson Model 63

and maneuverability

Wolff 17 LB Recoil Spring - S&W 4043/4046 .40 S&W | Part 46917 Magazine Tube The thumbpiece is the leverWolff Standard Recoil Spring S&W . 40 S&W Pistols Wolff 17 LB standard recoil spring (Part #46917) engineered to factory specifications for Smith & Wesson . 40 S&W pistols. Includes firing pin spring. Premium USA made replacement for reliable cycling. Compatible Models: . 40 S&W Models: 410, 411, 4003, 4004, 4006, 4026, 4043, 4044, 4046 Product Features: 17 LB standard weight factory specification for . 40 S&W Includes firing pin spring Premium music