Smith & Wesson M&P Sear Spring
Factory OEM Part #399670000
Genuine Smith & Wesson factory sear spring for all M&P pistols. Critical fire control component that ensures proper sear engagement and trigger reset.
Key Features:
- Factory OEM quality
- Precision-wound for consistent tension
- Essential fire control component
- Universal fit across M&P platform
- Direct replacement part
Compatibility:
✓ Compatible with:
- M&P Shield 9mm, .40, .45 (1.0 & 2.0)
- M&P Compact 9mm, .40, .45 (1.0 & 2.0)
- M&P Full Size 9mm, .40, .45 (1.0 & 2.0)
Function:
The sear spring provides the tension needed for proper sear engagement with the striker and ensures the sear returns to position after each shot, allowing proper trigger reset.
When to Replace:
Replace if experiencing trigger reset issues, inconsistent trigger pull, or if spring shows signs of weakening or compression.
Maintain reliable fire control with genuine Smith & Wesson factory parts.