S&W M&P 1.0 Sear Housing Block – No Thumb Safety (NTS) | Part# 423690000
$60.99
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S&W M&P 1.0 Sear Housing Block – No Thumb Safety (NTS) | Part# 423690000
$60.99
S&W M&P 1.0 Sear Housing Block (NTS) – OEM Replacement Part
Restore your firearm’s performance with this Genuine Smith & Wesson OEM Sear Housing Block. Designed specifically for the original M&P 1.0 series, this assembly is the "No Thumb Safety" (NTS) version with the integral sear deactivation lever.
This is a New OEM Part (Part# 423690000) featuring the RST (Reset) internals, ensuring factory-standard reliability and a crisp trigger reset for your duty or carry pistol.
Compatibility Chart
Because S&W parts can be specific to certain generations and frame sizes, please use the table below to ensure this part fits your project.
Product Specifications
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Manufacturer: Smith & Wesson
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MPN: 423690000
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Generation: 1.0 (Original)
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Safety Type: No Thumb Safety (NTS)
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Condition: New OEM Factory Part
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Features: Includes Sear, Sear Spring, Plunger, and Sear Deactivation Lever.
Note: Installation of firearm parts should be performed by a qualified gunsmith. Ensure your firearm is unloaded and safe before attempting any maintenance.
| Fits These Models (1.0 Series) | Does NOT Fit |
| M&P Full Size (9mm, .40 S&W, .357 Sig) | M&P M2.0 Models (All sizes) |
| M&P Compact (9mm, .40 S&W, .357 Sig) | M&P Shield / Shield Plus / Shield M2.0 |
| M&P45 Full Size & Mid-Size | M&P Bodyguard |
| Models without Manual Thumb Safeties | Models WITH Manual Thumb Safeties |