Skip to product information
Smith & Wesson MP401C Smith & Wesson Pistol M&P Slide Assembly Used Part .40 S&W Part 000000000

Smith & Wesson M&P .40 S&W Slide, Barrel & Recoil Spring Assembly Used – Part# MP401C

$269.99

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.

You may also like