S&W M&P 9/40 Sear Housing Block Manual Safety | OEM 423870000 422500000 This small but essential component

This small but essential component works with the extractor to ensure reliable ejection of spent cartridge cases across multiple Sigma models in 9mm

with over 11 million units manufactured since 1951

Contact us for all your S&W gunsmithing needs

consistent performance that has made it a favorite among law enforcement

S&W M&P 9/40 Sear Housing Block Manual Safety | OEM 423870000 422500000 This small but essential componentSmith & Wesson OEM Sear Housing Block Assembly for M&P 9 40 Pistols with Manual Safety Lever This factory sear housing block assembly with integrated manual safety lever is a critical fire control component for M&P9 and M&P40 pistols equipped with manual thumb safety. Genuine S&W quality ensures proper fit, reliable function, and safe operation. Genuine S&W Part: Factory OEM component (Part #423870000) Multi Caliber Fit: Compatible with M&P 9mm and .