The Smith & Wesson Firing Pin Spring is a factory replacement component designed specifically for a wide range of Smith & Wesson semi-automatic pistols. Built to original specifications, this steel spring helps maintain reliable firing pin energy and consistent ignition in compatible 9mm Luger and .40 S&W models.

This firing pin spring is intended for owners of Smith & Wesson models 3913, 3953, 400, 4006, 4013, 4043, 4046, 4056, 410, 5903, 5904, 5906, 5943, 5946, 6904, 908, and 910 who want to keep their pistols running smoothly with genuine parts. Ideal for routine maintenance, range use, training, and general shooting, it offers a straightforward way to refresh a critical internal component while preserving the manufacturer’s original design and performance standards.

• Manufacturer: Smith & Wesson
• Model: Firing Pin Spring
• Material: Steel
• Compatible Models: 3913, 3953, 400, 4006, 4013, 4043, 4046, 4056, 410, 5903, 5904, 5906, 5943, 5946, 6904, 908, 910
• Compatible Cartridges: 9mm Luger, .40 S&W
• Quantity: 1