Smith & Wesson M&P .40 S&W Locking Block & Pin Used – Part# MP402D
$12.99
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Smith & Wesson M&P .40 S&W Locking Block & Pin Used – Part# MP402D
$12.99
Smith & Wesson M&P .40 S&W Locking Block & Pin – Used
Part Number: MP402D | Condition: Used (Factory Original) | Caliber: .40 S&W
Restore your M&P .40 to factory-correct function with this genuine Smith & Wesson locking block and pin. The locking block is a critical component that locks the barrel into battery during firing — proper fit and function are essential for safe and reliable operation. This listing includes the locking block and pin as an assembly.
- Part Number: MP402D
- Fits: Smith & Wesson M&P .40 S&W (full-size)
- Caliber: .40 S&W
- Includes: Locking block and pin
- Condition: Used – factory original S&W part
- Installation: Gunsmith fitting recommended
Compatibility Note
This locking block is specific to the full-size M&P .40 S&W. It is not interchangeable with the M&P .40 Compact (MP4015G), M&P Shield (MP4015D), or other caliber variants. If you are unsure of compatibility, contact us with your model and serial number.
Factory Replacement Quality
Genuine Smith & Wesson factory parts are manufactured to the exact specifications and tolerances of the originals — same materials, same dimensions, same reliable function.
Professional gunsmith installation recommended. Some parts may require fitting.