S&W M&P 1.0 Sear Housing Block – No Thumb Safety (NTS) | Part# 423690000 396 Part number: 441160000

Part number: 441160000

Part: Cylinder Assembly & Yoke

Old-style design — verify compatibility with your specific serial range before ordering

This is an old-style pre-model era part for early S&W K-frame swing-out cylinder revolvers produced before the model numbering system began in 1957–58

S&W M&P 1.0 Sear Housing Block – No Thumb Safety (NTS) | Part# 423690000 396 Part number: 441160000S&W M&P 1. 0 Sear Housing Block (NTS) OEM Replacement Part Restore your firearms 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