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Sig P322 Review: Worthy .22 LR Trainer?

We take a look at Sig Sauer's latest creation -- the P322, a .22 LR pistol perfect for training. Read up on how this gun performed at the range.

    Check out Sean’s review of Sig P322 in the video above!

    The Sig P322 is another entry into the growing category of .22 LR trainers. We recently spent some time with one out at the range to see how it performed.

    This is an exciting new category of firearms with applications to a lot of different shooters. In short, the P322 performed very well! But let’s not get ahead of ourselves.

    P322 - shooting close
    Sig Sauer P322

    Follow along as I give you the pros, cons, specs, and features as well as my final verdict on this plinker.

    So, read on!

    Table of Contents


    Sig Sauer P322 Pros & Cons


    •20+1 capacity
    •Great trigger
    •Optics ready
    •Suppressor ready


    • Runs out of ammo quickly

    The Bottom Line

    Sig has done an outstanding job with the P322. If you’ve got the cash and the inclination, you can’t go wrong in picking up this fun little shooters.

    P322 - smile
    Guns that make you smile are a good thing.

    Sig Sauer P322 Specs & Features

    Sig Sauer P322

    Source: Sig Sauer

    at Kygunco

    Prices accurate at time of writing

    Prices accurate at time of writing

    Available Coupons


    Recently there have been a few entries into what I’d describe as a new category of handgun, the .22 trainer.

    This is basically a gun that looks and functions just like a standard 9mm model, but it is chambered in .22 rimfire.

    P322 - studio 2

    Glock came out with the G44 modeled after the G19. FN offered the 502 Tactical — a plinking copy of the 509.

    And now, Sig Sauer has created the P322…a fun-packed, rimfire model very reminiscent of the P320. In essence, it is a slightly smaller version with a 20+1 capacity, threaded barrel, and its optics ready.

    P322 - grip fit
    Slightly smaller than the P320

    By now I’ve tried a few of these pinking marvels so I knew what to expect. I grabbed a cross-section of .22 ammo and headed to the range to start testing.

    Who Is It For?

    The P322 would be an obvious choice for anyone starting out with shooting handguns, particularly if they will be transitioning to the P320 in the future. That’s no requirement though, as the gun is just plain fun, and would be a hoot for shooters of all experience levels.

    Fit & Feel

    Out of the box the P322, like other .22 models, is much lighter than its predecessor.

    Other than that, a few things stood out prominently in my mind — the green, fiber optic, sights were pretty amazing in the Texas sun. And its grip texture was aggressively on point.

    P322 - sights
    The fiberoptic sights are outstanding

    Not to mention, the gun fit in my hand marvelously

    How Does It Shoot?

    I noticed an external safety, a rail for a weapon light, mount for a red dot, and two 20-round magazines.

    Digging through the box a bit, I noticed there was an adapter for a suppressor, as well as a magazine loading assistance tool.

    P322 - magazine
    P322 – magazine

    This loading tool is a nice little sleeve that fits over the magazine and helps you apply downward pressure on the two thumb buttons which help you compress the spring under the follower.

    P322 - reload
    Feels much like the P320

    I ran some drills and also tested accuracy but was delighted with the whole experience. It’s hard to describe how pleasant it is to shoot this gun.

    There’s no recoil, your sights stay on target, the trigger is really good and the ergonomics are great!

    The only thing that sucks about this gun is you very quickly find yourself having to reload, over and over again.

    P322 - accuracy
    Around 1 inch groups at 7 yards

    I tested accuracy from 7 yards and was able to put some groups together that were decent.

    Running the plate rack, I found it pretty easy to adjust my aim to hit the top of each plate so I could get them to fall.

    For reloads, the magazines dropped freely and inserted easily due to the design of the magwell. There’s a slight flare on the outside, but the interior has a funnel-like feature that guides the magazines in.

    P322 - magwell
    The magwell is superb

    The slide locked back on empty every time with one exception. Likely, that’s due to ammo. You can’t discount how much .22 ammunition affects the performance of guns like this.

    For testing, I ran Aguila Super Extra 40 grains, SK Standard Plus 40 grains, Wolf Match Extra 40 grains, and SK Match 40 grains.

    Box after box, the P322 ran with remarkable reliability.

    P322 - stovepipe
    Worth noting, this was an unfired round

    In total, I think I had one stovepipe and one failure to lock back across 500+ rounds during testing.

    What Sets it Apart?

    Without a doubt, the 20-round magazine capacity sets this gun above its peers in the .22 Trainer category. Otherwise, it is very much a Sig in form and function.

    By The Numbers

    Reliability: 5/5

    I’m used to having a bit of a struggle with .22 trainers…but I didn’t have an issue with the Sig. It ran very well with a few different ammo brands.

    Ergonomics: 5/5

    The grip contours were really nice, and the gun fit my hand extremely well. Though not strictly necessary, the grip texture was a nice touch. The controls were all easy to reach.

    Accuracy: 4/5

    I shot several different groups from 7 yards and my best was around 1 inch or less. The sights were extremely visible and the trigger break was solid.

    Customization: 4/5

    Out of the box, this gun is ready to receive Sig’s Romeo Zero optic, a light, and a suppressor. It’s unclear how the gun will run with an adapter plate and other optics though.

    Value: 4/5

    The prices I’m seeing at the time of this review are around $400 and I think if you’re in the market for this type of gun, it’s a great buy.

    Overall: 4.5/5

    at Kygunco

    Prices accurate at time of writing

    Prices accurate at time of writing

    Available Coupons

    Upgrades for Sig Sauer P322

    With the rail, you can mount nearly any light you want on the front of the P322. In addition, shooters can mount up Sig’s Romeo Zero optic.

    P322 - grip texture
    Outstanding grip texture isn’t required, but helps shooters get ready if they advance to the P320

    I’m guessing other optics via adapter plates might be a viable option but would want to test how the additional mass may or may not affect cycling.

    Also, check out our review of the FN 502 Tactical to see some realities of shooting a red dot on a .22 pistol.

    The P322 comes with a thread protector for the barrel, as well as an adapter to 1/2 by 28 for those wanting to shoot suppressed.

    Field Strip & Reassembly

    Since .22LR is dirty and you’re going to have so much fun shooting…we made our own quick field strip guide so you can clean and oil it back up for more.

    Final Verdict

    The P322 is a great pistol and I had a lot of fun shooting the gun. Pinging steel repeatedly, at just about any speed you can muster, is a great time.

    It’s even better when you don’t feel like you’re putting yourself in the poor house doing it.

    P322 - serrations
    Well done Sig

    This is a superb shooter that ran reliably with a variety of different ammo and it is a good value at around $400.

    Have a P322 and need to know how to break it down? We got you! Check out our field strip video below.

    Do you have a use for 22 Trainers like the P322? Let us know in the comments below and check out our 6 Best .22LR Pistols/Handguns for even more options.

    Sig Sauer P322 Gun Deals

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    Sig Sauer P322

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    Own this gun? Add your rating!

    Rating score


    2 ratings

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    8 Leave a Reply

    • Commenter Avatar

      Sig happens to make some of the best guns you can buy. My P226 Navy is the nicest 9mm I have ever shot. So reliable, such high quality, lowest recoil. Can’t wait to get a P322. No wonder the entire US Army is switching to Sig Sauer rifles and pistols.

      April 25, 2022 10:04 am
    • Commenter Avatar

      Thanks for the review Sean... my only point would be I question the statement about this being a "new category of handgun". Smith & Wesson goes back many years with the K-22 Model 17 & Model 18 to be used as practice for service issued S&W .357's. They were made to the same K-Frame and weight, but in 22LR. My Model 18 serial number tracks to 1959. So, not so new.
      Anyway, I've been looking at the S&W 22Compact for this same reason. This review plays in to my thoughts. Thanks.

      April 22, 2022 6:55 am
      • Commenter Avatar
        Sean Curtis

        PC, that's a good point. When I first started in law enforcement, revolvers had just recently been traded in for autos and Glock had just come out with the G17. I own several revolvers, even have a couple like you've described, but they don't always make it into my salient thinking. But you're right, the concept is certainly not new.

        April 22, 2022 8:47 am
    • Commenter Avatar
      Roy Anderson

      I am glad Sig actually came up with a decent 22 auto pistol. I bought a mosquito some years back,talk about DISAPOINTMENT. Yes i used the CCi Stinger ammo
      the proper recoil spring and still
      nothing but jam city.the mosquito
      is nothing but a well made piece of
      junk . So I will never give Sig any more of my money! My purchase in
      the future will only be H&K (German) or least Colt ,Ruger or S&W!

      April 21, 2022 11:00 pm
    • Commenter Avatar

      So how exactly does the threaded adapter attach to the barrel?

      April 21, 2022 4:57 pm
      • Commenter Avatar
        Bill Stephens

        Screws on the barrel just like the thread protector that comes with the gun.

        April 21, 2022 8:23 pm
      • Commenter Avatar
        Sean Curtis

        Bill is correct, the barrel is threaded and comes with a thread protector.

        April 22, 2022 8:39 am
        • Commenter Avatar

          Is it similar to the Walther P22 with respect to the threaded barrel?

          July 13, 2022 11:30 am
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