AlphaWolf Barrel for M&P Shield 40-9 conversion barrel threaded 1/2 x 28

Will NOT be shipped to the following areas: California, Connecticut, Washington, Illinois, and New York
(3 reviews)

Current Stock:
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Length 3.68 inch, 94 mm

Upgrade your M&P Shield with our AlphaWolf conversion barrel! Take your .40 S&W Shield and convert it to 9mm with our barrel, which also improves accuracy in your compact gun. The AlphaWolf barrel is compatible with both Shield 1.0 and 2.0 models, making it the perfect choice to convert your gun! Additionally, this conversion barrel is threaded with industry standard 1/2x28 threads, making it capable of accepting accessories such as compensators or suppressors.

Barrel Features:

  • Convert your .40 S&W to use 9mm ammo.
  • Fits S&W Shield .40 S&W
  • Designed for lead, plated, or jacketed ammunition
  • Certified, stress relieved 416 stainless steel
  • Button rifled, three stage honed bore
  • Industry recognized SBN premium coating (SBN is Salt Bath Nitride, similar to Tennifer)
  • Exacting tolerances allow for drop in installation
  • Fluting creates path for heat and debris to escape
  • Fits in a Shield Pro model, but will not utilize slide ports.

*We are unable to custom chamber or port AlphaWolf S&W Shield barrels at this time.

*Non-CA compliant

Do not use +P or +P+ ammunition in any Lone Wolf branded replacement barrel for the Glock 42, Glock 43, S&W Shield or Ruger LC380 series. Between inconsistences with ammunition manufacturers loading practices, which may not conform to SAAMI specifications, unsafe firing conditions may result with these non-standard loads. Accordingly, use of +P or +P+ ammunition in these Lone Wolf barrel models will void the warranty.

(3 reviews) Write a Review
  • 4
    Good product at a great price

    Posted by Chris on 21st Mar 2023

    This threaded .40 to 9mm conversion barrel fits perfect and has worked flawlessly thus far. Beautiful finish, very nice machine work. The specs are spot on. If your in the market for a barrel I would highly recommend Lone Wolf.

  • 5

    Posted by Nino on 6th Feb 2023

    Perfect fit and quality. I trust and highly recommend Lone Wolf products 100%.

  • 5
    Drop in 9mm barrel for M&P Shield 40 gen1

    Posted by blindrodie on 30th Dec 2022

    It took less than 30 seconds to smoothly drop the LW 9mm barrel into my Shield 40 and fire down range. I went through a few hundred rounds with nothing but perfection and performance. Nothing like a brand new gun for less than $200. Can’t say enough about how well this barrel performs.

Barrel Length:
3.68in (94mm)