Smith & Wesson Model 4043 Mainspring & Plunger Spring .40 S&W 4043R 3904 or M&P enthusiast

or M&P enthusiast

This critical fire control component ensures reliable ignition and consistent trigger performance in your

Part Number: 16B

Genuine S&W Part: Factory original component ensures perfect fit and function

Smith & Wesson Model 4043 Mainspring & Plunger Spring .40 S&W 4043R 3904 or M&P enthusiastSmith & Wesson Model 4043 Mainspring & Plunger Spring Used OEM Part Genuine S&W mainspring and plunger spring (Part# 4043R) for Model 4043 . 40 S&W DAO pistols. Critical springs for reliable trigger operation. Part Number: 4043R Model: Smith & Wesson 4043 Caliber: . 40 S&W Condition: Used OEM part in good working condition Professional gunsmith installation recommended.