Smith & Wesson M&P Series Safety Detent Spring - 9mm/.40/.45 - Factory OEM 391640000

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.