Smith & Wesson M&P Safety Detent Spring
Factory OEM Part #391640000
Genuine Smith & Wesson factory safety detent spring for M&P Shield and Compact pistols equipped with manual safety. Provides tension for the safety detent.
Key Features:
- Factory OEM quality
- Precision-wound for proper tension
- Ensures positive safety engagement
- Direct replacement spring
- Essential safety component
Compatibility:
✓ Compatible with:
- M&P Shield 9mm, .40, .45 (manual safety models)
- M&P Compact 9mm, .40, .45 (manual safety models)
- M&P Full Size 9mm, .40, .45 (manual safety models)
⚠️ Important: Only for models equipped with manual safety.
Function:
The safety detent spring provides the tension needed for the safety detent to engage the manual safety lever positively, ensuring it stays in position.
When to Replace:
Replace if safety lever feels loose, doesn't engage positively, or if spring shows signs of weakening or compression. Critical safety component.
Maintain safety systems with genuine Smith & Wesson factory parts.