M&P Sear Housing Block Assembly - 9mm/.40 S&W (Manual Safety)
Factory Smith & Wesson sear housing block assembly for M&P pistols equipped with manual safety. This critical component houses the sear and related parts that control the trigger mechanism.
Features:
- Factory OEM part #423420000
- Complete assembly for manual safety models
- Precision-machined to exact S&W specifications
- Houses sear and trigger components
- Direct replacement for worn or damaged assemblies
- Essential for proper trigger function
- New, never used condition
Compatibility:
Fits Smith & Wesson M&P pistols with manual safety in 9mm and .40 S&W:
- M&P9 Full Size
- M&P9 Compact
- M&P40 Full Size
- M&P40 Compact
Note: This is specifically for manual safety equipped models.
Installation:
Gunsmith installation required. Requires complete disassembly of the frame and trigger assembly. Professional fitting and installation by a qualified gunsmith is strongly recommended.
Factory replacement parts are manufactured to exact specifications and tolerances using the same materials as original equipment.