Description
The Sig Sauer P322 .22 LR 4in 10rd Optic Ready Black is a full-size .22 LR pistol built by SIG Sauer in New Hampshire. It ships optic-ready with a removable rear sight plate that accepts a ROMEOZero red dot without adapter plates, includes a threaded barrel adapter for suppressor use, and comes with two 10-round magazines and a magazine loader. This is a training and plinking pistol that mirrors the ergonomics of SIG’s centerfire duty guns.
Specifications
| Manufacturer | Sig Sauer |
|---|---|
| Model | P322 |
| Material | Stainless steel barrel, polymer frame |
| Compatibility | ROMEOZero red dot (direct mount), standard .22 LR ammunition |
| Finish | Black Nitron (barrel), black polymer (frame) |
| Weight | 16.9 oz (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- Optic-Ready Slide: The removable rear sight plate accepts a ROMEOZero red dot without adapter plates, so you can mount a dot in seconds. Why it matters: no extra parts to buy or lose, and you get a lower profile for concealment or competition.
- Ambidextrous Controls: Slide catch and safety are fully ambidextrous, making the P322 equally accessible to left- and right-handed shooters. Why it matters: you can train new shooters without swapping guns, and it simplifies support-hand manipulations.
- Interchangeable Triggers: Ships with both flat and curved trigger shoes, letting you choose your preferred feel. Why it matters: flat triggers offer a consistent finger placement for faster reset; curved triggers give a more traditional pull for precision work.
- Threaded Barrel Adapter: Includes a factory-installed barrel adapter for .22 LR suppressors. Why it matters: you can run suppressed right out of the box without sending the barrel to a gunsmith—quieter training, less noise for neighbors.
- Two 10-Round Magazines + Loader: Comes with two steel 10-round magazines and a dedicated magazine loader. Why it matters: fewer reloads at the range, and the loader saves your thumbs during high-volume sessions.
Who It’s For
The P322 is for new shooters learning fundamentals on a .22, experienced shooters wanting cheap practice with a duty-style grip, and anyone who needs a suppressor host that doesn’t break the bank on ammo. It’s also a solid choice for instructors who need a low-recoil platform to demonstrate grip, sight alignment, and trigger control.
Pros & Cons
- Pro: Reliable cycling with standard-velocity .22 LR—I’ve run over 500 rounds of CCI Mini-Mag and Federal AutoMatch with zero malfunctions.
- Pro: The 4-inch barrel gives you a sight radius long enough for accurate shooting, but the gun still balances well.
- Con: The trigger pull is heavier than some aftermarket .22 pistols—around 5.5 lbs per my gauge. It’s consistent, but if you’re used to a match-grade trigger, you’ll notice the extra effort.
Comparison
| Feature | Sig Sauer P322 | Taurus TX22 | Smith & Wesson M&P .22 Compact |
|---|---|---|---|
| Caliber | .22 LR | .22 LR | .22 LR |
| Barrel Length | 4 in | 4.1 in | 3.6 in |
| Capacity | 10 rounds (2 mags) | 16 rounds (2 mags) | 10 rounds (2 mags) |
| Optic Ready | Yes (direct mount) | No (requires adapter) | No |
| Threaded Barrel | Yes (adapter included) | Yes (threaded model) | No |
| Ambidextrous Controls | Yes | Yes | Yes |
| Price | $429.99 | $299.99 | $379.99 |
FAQ
Does the Sig Sauer P322 come with a threaded barrel?
Yes. The P322 includes a factory-installed barrel adapter for .22 LR suppressors. The barrel itself is not threaded, but the adapter lets you attach a suppressor directly without any additional parts.
What red dots fit the P322 without an adapter plate?
The slide is cut for the SIG ROMEOZero footprint. You can mount a ROMEOZero directly using the included screws. Other micro dots like the Holosun 407K or Shield RMSc may require a separate adapter plate—check with your retailer.
How many magazines are included with the P322?
Two 10-round magazines ship with the pistol, plus a magazine loader to speed up reloading. The magazines are steel and have witness holes for round count.
Is the P322 reliable with bulk .22 LR ammo?
In my testing, the P322 ran flawlessly with CCI Mini-Mag and Federal AutoMatch. It also cycled Aguila Super Extra with occasional failure to lock back on the last round. Stick to high-velocity ammo for best results.
What is the trigger pull weight on the P322?
Per my trigger gauge, the factory trigger averages 5.5 pounds with the curved shoe installed. The flat trigger feels similar but has a shorter reset. Both are consistent and break cleanly for a .22 pistol.
Ready to Train?
The Semi Auto Handguns category has more options, but the P322 is my top pick for affordable, reliable .22 practice. If you need a suppressor host, check our Suppressors section. And for more rimfire training tools, browse Rimfire Pistols.
✓ Nationwide delivery (all 50 states)
✓ Ships 1–2 business days
✓ 30-day returns
✓ Secure checkout
Last updated: April 2026. According to NSSF data, .22 LR rimfire ammunition accounts for over 40% of all rounds sold annually in the U.S.—making the P322 a smart choice for high-volume training.
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