The Smith & Wesson Sear Housing Block Assembly, Nms, Mag Saf is a factory replacement component engineered specifically for the M&P series pistols chambered in 45 ACP. Built from durable steel with a matte blued finish, this assembly restores proper sear function and magazine safety operation using the same geometry and fit as the original part.

This sear housing block assembly is ideal for owners looking to maintain reliability or upgrade early M&P 45 pistols to the larger sear plunger and spring design. It is well suited for range use, training, and general duty or home-defense pistols where consistent trigger performance is important. Backed by Smith & Wesson’s long-standing reputation for quality firearms and parts, this assembly offers a precise, drop-in solution when service or replacement is needed.

• Manufacturer: Smith & Wesson
• Model: Sear Housing Block Assembly, Nms, Mag Saf
• Material: Steel
• Compatible Firearm: Smith & Wesson M&P 45 ACP
• Finish: Matte Blued
• Configuration: Factory Replacement Sear Housing Block With Magazine Safety