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S&W M&P22 Compact Thread Adapter

The United Defense Thread Adapter converts the Smith & Wesson M&P22 Compact pistol from its factory 3/8x24 barrel threads to the industry-standard 1/2x28 thread pitch used on virtually every rimfire suppressor and muzzle device. The adapter replaces the factory barrel nut directly, requires no gunsmithing, and ships with a matching thread protector to keep the threads safe when nothing is mounted. Machined from steel with a matte black finish, it pairs cleanly with cans like the SilencerCo Sparrow, Gemtech Outback, Dead Air Mask, and other 1/2x28 .22 LR suppressors. A must-have for any M&P22 Compact owner planning to run a suppressor or muzzle device.

In stock

SKU
UD-TA-MP22C
  $10.95
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Description

Features

  1. Converts To Industry-Standard 1/2x28 Threads — Adapts the factory 3/8x24 barrel nut on the S&W M&P22 Compact over to the common 1/2x28 RH thread pitch used by virtually all rimfire suppressors and muzzle devices.
  2. Direct Factory Barrel Nut Replacement — Drops in as a one-for-one swap with the original M&P22 Compact barrel nut, no gunsmithing or permanent modification required.
  3. Includes Thread Protector — Ships with a matching knurled thread protector to keep the 1/2x28 threads clean and undamaged when no suppressor or muzzle device is mounted.
  4. Steel Construction — Machined from steel with a matte black finish for durability and a consistent appearance against the M&P22 Compact's slide and barrel.
  5. Suppressor-Ready Compatibility — Works with any 1/2x28 threaded .22 LR suppressor, including SilencerCo Sparrow, Gemtech, Dead Air Mask, AAC Element, and similar rimfire cans.
  6. Accepts Common Muzzle Devices — Beyond suppressors, the 1/2x28 threads also fit fake suppressors, compensators, and muzzle brakes built for .22 LR and 9mm pistols.
  7. Compact Model Specific — Engineered specifically for the M&P22 Compact pistol — not the full-size M&P22 — for correct fit and concentricity.
  8. Simple Installation — Unscrew the factory barrel nut, thread on the adapter, and you're ready to mount a rimfire suppressor in minutes.

More Information

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S&W M&P22 Thread Adapter

Customer Reviews

5

16 reviews

86% of customers recommend this product

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Top customer reviews

  1. MarcusT

    Verified Buyer

    Perfect fit, works great with suppressors

    Value

    Overall Rating

    Price

    Quality

    Got this adapter for my M&P22 compact and its exactly what I needed. Threaded it on and immediately attached my suppressor, everything lines up perfectly and stays put. The machining looks solid and I havent had any issues with it coming loose after about 200 rounds through it. Only wish they included instructions but it was pretty straightforward to figure out.

    Tight fit no wobbling or wiggling Good quality machining feels durable

    No instructions included in the box

  2. Ocalajo

    Verified Buyer

    Perfect fit

    Value

    Overall Rating

    Price

    Quality

    Perfect fit. Arrived quickly. Great price
  3. Dukes

    Verified Buyer

    Perfect fit for my M&P22 Compact.

    Value

    Overall Rating

    Price

    Quality

    I bought this to run my suppressor on my Smith and Wesson and it works great. The threads are super clean and it was really easy to swap out the factory nut. It looks like it belongs on the gun and has not come loose yet after a few range trips.

    Very easy to install

  4. WSuckow

    Verified Buyer

    Easy install for suppressor mounting.

    Value

    Overall Rating

    Price

    Quality

    This adapter let me attach my suppressor to my M&P22 Compact. It went on easily and the threads are perfectly straight.
  5. Tim

    Verified Buyer

    Simple, effective, and reliable.

    Value

    Overall Rating

    Price

    Quality

    You do not need a gunsmith to get this installed, which saved me a lot of time and money. It is a simple part that makes a huge difference in the versatility of my favorite .22 pistol.

    No gunsmithing required and very versatile.

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