This OEM factory-new sear spring, part number 399670000, is engineered for Smith & Wesson M&P full-size and compact models. It fits M&P 9, M&P 9 Compact, M&P Shield 9, M&P 40, M&P 40 Compact, M&P Shield 40, M&P 45, M&P 45 Compact, M&P Shield 45, and M2.0 variants, providing dependable trigger function and consistent performance.
Features: Smith & Wesson Factory New Part
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Gunsmiths Required: Disassembly and Assembly required to replace part.
Some parts may require installation and fitting by a qualified gun smith Factory replacement parts are manufactured to the exact same specifications and tolerances and use the same manufacturing materials as the original parts.