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The M&P 22 Compact is one of the best little suppressor hosts out there, except for one catch: Smith & Wesson threaded the muzzle in 3/8×24, and nearly every rimfire can on the market is cut for 1/2×28. SilencerCo's Delta Adapter (AC875) fixes that in about ten seconds. Spin it onto your factory threads and you have a standard 1/2×28 mount ready to accept a Sparrow 22, Switchback 22, Spectre 22, Warlock 22, Osprey Micro, or any other rimfire suppressor with that thread pitch, regardless of who made it.
The detail that separates this from a bargain-bin adapter is the O-ring engagement. That rubber ring does two jobs at once. It seals off the factory threads so carbon and rimfire gunk stay out, and it puts constant tension on the connection so your suppressor doesn't slowly back off while you're running through a brick of ammo. Anyone who has shot a few hundred rounds of .22 through a can knows how much fouling builds up, and how annoying it is to stop and re-tighten every couple of magazines. This little piece of steel quietly handles both problems.
The body is machined steel with a matte black finish that blends right in with the Compact's threaded barrel. SilencerCo also includes a knurled thread protector with its own O-ring, so when the suppressor is home in the safe, the adapter threads stay covered and the pistol keeps a clean profile at the range.
This adapter is made specifically for the M&P 22 Compact and will not fit the full-size M&P 22, which uses a different metric thread and needs SilencerCo's AC5 adapter instead. If you've got the Compact, though, this is the straightforward, do-it-once answer to getting that pistol running quiet. Made in the USA.
No, this one is Compact-only. The full-size M&P 22 uses a different metric thread pitch, so it needs SilencerCo's AC5 adapter (the same one used for the Walther P22). Double-check which pistol you have before ordering, since the two adapters are not interchangeable.
Not at all. Once the adapter is on, your muzzle presents standard 1/2×28 threads, which is what nearly every rimfire suppressor on the market uses. It pairs naturally with SilencerCo cans like the Sparrow 22, Switchback 22, and Warlock 22, but any brand cut for 1/2×28 will thread right on.
The O-ring serves double duty. It seals the connection so carbon and rimfire fouling stay off your pistol's factory threads, and it applies constant tension that keeps the adapter and suppressor from working loose while you shoot. That means fewer stops to re-tighten your can during long range sessions.
Yes. SilencerCo includes a knurled steel thread protector that also uses O-ring engagement. You can leave the adapter installed full time and just cap the threads when your suppressor is off the gun.
| UPC | 817272012163 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | AC875 |
| Caliber/Gauge | .22 LR |
| Chokes Included | 1/2"-28 tpi |
| Length | Rimfire |
| Model | |
| Product Type | Accessory-Silencer Accessories |
| Shipping Weight | 0.05 |
| Sights | Steel |
| Thread Pattern | 1/2"x28 |
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