Smith & Wesson M&P .40 S&W Slide, Barrel & Recoil Spring Assembly Used – Part# MP401C
Smith & Wesson M&P .40 S&W Slide, Barrel & Recoil Spring Assembly – Used
Part Number: MP401C | Condition: Used (Factory Original) | Caliber: .40 S&W
A complete upper assembly for your M&P .40 — this listing includes the slide, barrel, and recoil spring as a matched factory assembly. Whether you're replacing a damaged slide, building a spare upper, or restoring a parts pistol, this is a cost-effective alternative to sourcing each component separately. All parts are genuine Smith & Wesson factory components.
- Part Number: MP401C
- Fits: Smith & Wesson M&P .40 S&W (full-size)
- Caliber: .40 S&W
- Includes: Slide, barrel, and recoil spring assembly
- Condition: Used – factory original S&W parts
- Installation: Professional gunsmith fitting required
Compatibility Note
This slide assembly is caliber- and size-specific to the full-size M&P .40 S&W. It is not interchangeable with the M&P .40 Compact, 9mm, or .45 ACP slide assemblies. 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 rifling, same dimensions, same reliable function.
Professional gunsmith installation required. Barrel fitting and headspace verification are critical operations that must be performed by a qualified gunsmith.