Smith & Wesson M&P 22X: What the Newest M&P Rimfire Pistol Gets Right
The Smith & Wesson M&P 22X is a modern .22 LR trainer built around full-size pistol ergonomics, a 20-round magazine, optics compatibility, and a threaded barrel. Introduced in 2025, the M&P22X was designed to give shooters a low-recoil rimfire platform that feels more like a contemporary centerfire handgun than a traditional target .22. Smith & Wesson lists a 4.1-inch barrel, 20-round magazines, a Picatinny-style accessory rail, an optics-ready slide, and a $499 MSRP.
That combination puts the M&P22X squarely in the .22 LR training pistol market, but it also makes the pistol interesting for recreational shooting, high-volume range sessions, and rimfire competition. Recent testing has generally been positive, with reviewers highlighting its low recoil, crisp trigger, optics compatibility, and strong performance for a rimfire trainer.
Smith & Wesson M&P 22X Specs
The most consistently reported specifications for the M&P22X include a 4.1-inch barrel, 20+1 capacity, and approximately 16.3 ounces unloaded. Smith & Wesson’s launch information also specifies a threaded barrel with a 1/2×28 adapter, optics-ready slide, Picatinny-style rail, ambidextrous manual safety, and reversible magazine catch.
| Specification | M&P22X |
|---|---|
| Cartridge | .22 LR |
| Action | Hammer-fired |
| Barrel length | 4.1 in. |
| Overall length | 7.25 in. |
| Unloaded weight | 16.3 oz. |
| Capacity | 20+1 |
| Barrel | Threaded, 1/2×28 adapter included |
| Optic mounting | Factory optics cut |
| Front sight | Hi-Viz LiteWave H3 fiber optic |
| Rear sight | Black serrated square-notch |
| Accessory rail | Picatinny-style |
| MSRP | $499 |
Smith & Wesson also offers a 10-round version for jurisdictions with magazine-capacity restrictions.
What Is the M&P 22X?
The M&P22X is a full-size polymer-frame .22 LR pistol designed around training and recreational shooting.
Rather than making a tiny rimfire handgun, Smith & Wesson gave the 22X a full-size grip and familiar controls. That makes the pistol easier to handle during extended shooting sessions and gives it a distinctly different feel from compact .22 LR pistols.
Its low recoil is one of the most obvious advantages. Recent reviewers have described the pistol as exceptionally easy to shoot, with the combination of .22 LR ammunition and the lightweight platform producing very little muzzle movement.
M&P22X Trigger
The M&P22X trigger is one of the pistol’s more distinctive features.
The pistol uses an internal hammer and a flat-faced trigger rather than the striker-fired system found on many centerfire M&P pistols.
GunsAmerica’s 2026 testing measured a trigger pull of approximately 3.5 pounds and described the break as crisp.
That is lighter and more competition-oriented than many shooters expect from a rimfire trainer.
It also gives the 22X a useful training characteristic: the shooter can practice trigger control with a relatively clean trigger without dealing with meaningful recoil.
Optics-Ready Design
The M&P22X optics-ready slide is another major difference from older rimfire trainers.
The slide is factory cut for compatible micro red-dot footprints, including RMSc and K-series configurations according to current reporting.
That lets shooters use a red dot without relying on an aftermarket slide modification.
The factory iron sights are also designed around the same training-focused approach. The pistol comes with a Hi-Viz LiteWave H3 fiber-optic front sight and a blacked-out serrated rear sight. Additional fiber-optic inserts allow the front sight color to be changed.
Threaded Barrel and Suppressor Compatibility
The M&P22X comes with a 4.1-inch threaded barrel and a 1/2×28 thread adapter. Smith & Wesson’s launch material specifically identifies the pistol as suppressor capable.
This is a particularly useful feature on a .22 LR pistol because rimfire ammunition is commonly used with suppressor-equipped platforms where legally permitted.
The thread adapter also allows the barrel to maintain a clean appearance when a suppressor is not installed.
20-Round Magazine
Capacity is one of the M&P22X’s most obvious strengths.
The pistol ships with two 20-round magazines, giving it a 20+1 capacity. A 10-round configuration is also available for restricted jurisdictions.
The magazine design is shared with the new M&P FPC 22LR, which is a useful feature for shooters who own both platforms. Smith & Wesson and American Rifleman both identify the two firearms as sharing the same 20-round magazine system.
The magazines also incorporate loading aids that make filling the 20-round capacity easier than it might otherwise be.
M&P22X and M&P FPC 22LR
Smith & Wesson introduced the M&P22X alongside the M&P FPC 22LR, creating a small rimfire ecosystem around the same magazine.
The FPC 22LR extends the company’s folding-carbine concept into .22 LR. American Rifleman reports that the pistol and carbine use the same 20-round magazines, giving owners a common magazine platform across both firearms.
That is a practical distinction between the M&P22X and many competing .22 LR pistols.
Instead of being a standalone rimfire design, the 22X fits into a broader Smith & Wesson rimfire lineup.
M&P22X vs. M&P 22 Compact
The M&P22X vs. M&P 22 Compact comparison is important because the two pistols serve similar training purposes despite being quite different designs.
The M&P 22 Compact dates to 2013 and was developed as an in-house Smith & Wesson rimfire pistol. Guns & Ammo’s long-term testing found the compact pistol reliable across a wide range of ammunition and described it as a serious training-oriented .22.
The newer 22X is larger, has substantially greater capacity, includes an optics-ready slide, and uses a threaded barrel with an adapter as standard.
The M&P 22 Compact remains attractive for shooters who specifically want a smaller rimfire pistol. The 22X is more oriented toward full-size training and extended range sessions.
M&P22X vs. Other .22 LR Trainer Pistols
The modern .22 LR trainer market is crowded, with competing pistols from Taurus, FN, Ruger, Walther, and others.
The M&P22X distinguishes itself through its combination of:
- Full-size ergonomics
- 20+1 capacity
- 3.5-pound-class trigger
- Factory optic cut
- Threaded barrel
- Picatinny rail
- Shared magazines with the M&P FPC 22LR
Recent reviewers have specifically highlighted the pistol’s full-size handling, low recoil, optics compatibility, and trigger.
That does not make the M&P22X automatically better than every competing .22 LR pistol. It does, however, give it a particularly well-rounded feature set.
M&P22X Reliability
Rimfire reliability is always worth discussing separately from centerfire reliability.
.22 LR ammunition varies considerably in velocity, bullet profile, coating, lubrication, and consistency. A pistol that works perfectly with one load can occasionally experience feeding or cycling problems with another.
Recent independent M&P22X testing has generally been favorable. GunsAmerica reported strong overall function while noting some magazine and fouling-related issues during testing.
American Rifleman’s more recent 2026 coverage also described the M&P22X as functioning as expected during its range evaluation.
That makes the most accurate conclusion a qualified one: the M&P22X has a promising reliability record, but ammunition selection and routine rimfire maintenance still matter.
M&P22X Accuracy
The M&P22X is not intended to replace a dedicated bullseye pistol, but its accuracy is more than adequate for its role as a trainer and recreational rimfire.
GunsAmerica’s 2026 review described the M&P22X as a strong performer and highlighted its flat-shooting characteristics and crisp trigger.
American Rifleman’s July 2026 coverage also reported impressive accuracy during a 100-yard NRL-style course of fire, although that was an informal event rather than a controlled bench-rest accuracy test.
The practical takeaway is that the 22X appears capable of considerably more than casual plinking.
Is the M&P22X Good for Training?
This may be the pistol’s strongest use case.
The M&P22X offers a grip, controls, sighting system, optic capability, and accessory rail that make it feel much closer to a modern full-size handgun than a traditional rimfire pistol.
That allows shooters to work on basic pistol fundamentals with very little recoil.
Because .22 LR ammunition is typically less expensive than centerfire pistol ammunition, a shooter can also spend more time practicing without the ammunition cost becoming the limiting factor.
Is the M&P22X Good for Beginners?
The combination of low recoil, light weight, full-size grip, and simple-to-understand controls makes the M&P22X approachable for new shooters.
NRA Family specifically described the pistol as an accessible option for new shooters while also emphasizing its suitability for experienced shooters who want a low-recoil range platform.
New shooters should still receive appropriate firearms-safety instruction and supervised range training.
Is the M&P22X Good for Competition?
The M&P22X is not primarily marketed as a specialized competition pistol, but its specifications make it suitable for informal rimfire competition and training-oriented matches.
The optic cut, fiber-optic front sight, adjustable rear sight, light trigger, threaded barrel, and 20-round magazine give it a useful competition-oriented feature set.
GunsAmerica’s testing specifically explored the pistol with irons, a red dot, and suppressor-equipped configurations, while American Rifleman’s 2026 event coverage reported running the 22X through a 100-yard NRL-style course.
Ammunition Selection
As with virtually every semi-automatic rimfire pistol, ammunition selection matters.
Standard-velocity and high-velocity .22 LR loads can behave differently depending on the firearm. Bullet profile and ammunition consistency can also affect feeding.
A good practice is to test the ammunition you intend to use in the particular pistol rather than assuming every .22 LR load will function identically.
This is especially important when moving between inexpensive bulk ammunition, match loads, and specialty subsonic ammunition.
Frequently Asked Questions
What is the Smith & Wesson M&P 22X?
The M&P22X is a full-size .22 LR semi-automatic pistol introduced by Smith & Wesson in 2025. It features a 4.1-inch barrel, 20+1 capacity, optics-ready slide, threaded barrel, Picatinny rail, fiber-optic front sight, and ambidextrous controls.
How much does the M&P22X cost?
Smith & Wesson lists an MSRP of $499. Actual retail pricing can vary by configuration, retailer, promotions, and location.
How many rounds does the M&P22X hold?
The standard configuration uses a 20-round magazine, giving the pistol a 20+1 capacity. Ten-round magazines are available for restricted jurisdictions.
Does the M&P22X come optics ready?
Yes. The slide is factory cut for compatible micro red-dot footprints, allowing an optic to be mounted without aftermarket slide machining.
Is the M&P22X threaded?
Yes. The pistol has a 1/2×28 threaded barrel and includes a thread adapter for suppressor-compatible configurations.
Does the M&P22X share magazines with the M&P FPC 22LR?
Yes. Smith & Wesson designed the 20-round magazine for compatibility with both the M&P22X pistol and M&P FPC 22LR.
Is the M&P22X reliable?
Recent testing has generally been positive, although rimfire ammunition can vary significantly between loads. GunsAmerica reported strong overall operation while noting some magazine and fouling-related issues, while American Rifleman’s 2026 testing found the pistol functioning as expected.
Bottom Line
The Smith & Wesson M&P 22X does not reinvent the rimfire trainer. Instead, it takes many of the features shooters now expect and combines them in one well-rounded package.
You get 20+1 capacity, a full-size grip, a crisp hammer-fired trigger, factory optics compatibility, a threaded barrel, accessory rail, and extremely low recoil. Smith & Wesson also gives the pistol an important connection to the M&P FPC 22LR through its shared 20-round magazine.
The older M&P 22 Compact remains a smaller alternative, while dedicated competition pistols can provide more specialized features. But for a shooter looking for a modern .22 LR training pistol that can also handle long recreational range sessions, the M&P22X makes a strong case.
The biggest reason to consider it is not one standout specification. It is the balance of capacity, ergonomics, optics compatibility, low recoil, and practical range features.
For shooters looking to stock up on .22 LR ammunition for an M&P22X or another rimfire trainer, Bulk Ammo Togo carries a range of compatible rimfire ammunition options.