Wolff 4 LB Reduced Power Striker Spring for Smith & Wesson M&P 9mm/.40/.357 Sig | Part 34201
$8.99
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Wolff 4 LB Reduced Power Striker Spring for Smith & Wesson M&P 9mm/.40/.357 Sig | Part 34201
$8.99
Wolff 4 LB Reduced Power Striker Spring for Smith & Wesson M&P 9mm/.40/.357 Sig Pistols
Part Number: 34201
Premium Wolff 4 LB reduced power striker spring (firing pin spring) for Smith & Wesson M&P pistols in 9mm, .40 S&W, and .357 Sig. Reduces trigger pull weight for improved accuracy and faster follow-up shots in competition shooting.
⚠️ Competition Use Only: This reduced power striker spring is NOT recommended for duty, carry, or self-defense applications. Always use factory-spec springs in firearms intended for defensive purposes.
Compatible Models:
- M&P 9mm — all full-size and compact variants (1.0 and M2.0)
- M&P .40 S&W — all full-size and compact variants (1.0 and M2.0)
- M&P .357 Sig — all variants
Not compatible with: M&P .45 ACP (requires different spring), Shield series, M&P22 series.
Spring Comparison:
| Spring Type | Weight | Best For |
|---|---|---|
| Factory Standard | 5 LB | Duty, carry, defense |
| Wolff Reduced Power | 4 LB | Competition only |
Key Features:
- 4 LB Reduced Power: Lighter trigger pull vs. factory 5 LB
- Compatible with M&P 1.0 and M2.0: Fits both generations in 9mm, .40, and .357 Sig
- Direct Replacement: Drop-in fit for factory striker spring
- Premium Quality: Made in USA by Wolff Gunspringmakers — over 75 years of expertise
- Condition: New
Technical Specifications:
- Spring Type: Striker Spring (Firing Pin Spring)
- Spring Weight: 4 LB (Reduced Power)
- Factory Weight: 5 LB
- Caliber: 9mm / .40 S&W / .357 Sig
- Manufacturer: Wolff Gunspringmakers (USA)
Installation:
Requires removal of the striker assembly from the slide. If you are not comfortable performing this procedure, have a qualified gunsmith install the spring. Always perform a complete function test before use.