Smith & Wesson M&P Shield Magazine Safety Spring
Factory OEM Part #421670000
Genuine Smith & Wesson factory magazine safety spring for M&P Shield pistols. Critical safety component that prevents firing when magazine is removed.
Key Features:
- Factory OEM quality
- Precision-wound spring
- Critical safety component
- Direct replacement spring
- Universal fit across Shield generations
Compatibility:
✓ Compatible with:
- M&P Shield 9mm (1.0 & 2.0)
- M&P Shield .40 S&W (1.0 & 2.0)
- M&P Shield .45 ACP (1.0)
Function:
The magazine safety spring provides tension for the magazine disconnect safety mechanism. When the magazine is removed, this safety prevents the pistol from firing.
When to Replace:
Replace if magazine safety is not functioning properly or if spring shows signs of weakening or damage.
⚠️ Safety Note: Magazine safety components should be installed by a qualified gunsmith to ensure proper function and safety.
Maintain safe operation with genuine Smith & Wesson factory parts.