M&P Sear Spring - 9mm/.40/.45 ACP
Factory Smith & Wesson sear spring for M&P pistols. This critical spring provides tension to the sear, ensuring proper trigger engagement and reset for safe, reliable trigger function.
Features:
- Factory OEM part #399670000
- Precision-manufactured for exact fit
- Provides proper sear tension
- Essential for reliable trigger function
- Direct replacement for worn or damaged springs
- New, never used condition
Compatibility:
Fits Smith & Wesson M&P pistols in 9mm, .40 S&W, and .45 ACP:
- M&P9 Full Size & Compact
- M&P40 Full Size & Compact
- M&P45 Full Size & Compact
- M&P Shield 9mm, .40, .45
- M&P M2.0 (all sizes and calibers)
Installation:
Gunsmith installation recommended. Requires disassembly of the frame and trigger assembly. Professional fitting may be required by a qualified gunsmith.
Factory replacement parts are manufactured to exact specifications and tolerances using the same materials as original equipment.