Last updated July 25, 2026. The Smith & Wesson M&P15-22 is the best-selling .22 LR AR-15 for good reason. It looks, feels, and runs like a real AR-15, right down to the controls, but it fires cheap .22 LR from 25-round magazines, weighs next to nothing, and costs a fraction of a centerfire rifle to shoot. As a trainer, a plinker, and a first rifle, it is close to perfect. Here’s the honest verdict.
Table of Contents
How we tested: Every pick here is ranked against our testing methodology. Minimum round counts, accuracy and reliability protocols, the failures that disqualify a gun. Where we have not shot a specific variant ourselves, we say so in that section.
S&W M&P15-22 Specifications
| Caliber | .22 LR (dedicated, not a conversion) |
| Action | Blowback semi-auto, AR-15 pattern |
| Capacity | 25-round magazines |
| Barrel | 16.5″ threaded (1/2×28) |
| Weight | ~5 lbs |
| Furniture | M-Lok handguard, adjustable stock, flip-up sights (Sport) |
| Controls | Functional AR-style safety, bolt catch, charging handle |
| Street price | ~$450 to $500 |
A Real AR-15 That Shoots .22
What makes the M&P15-22 special is that it isn’t a toy or a clunky conversion kit; it is a purpose-built rifle with genuine AR-15 ergonomics. The safety, magazine release, bolt catch, and charging handle all work exactly like a centerfire AR, so every trigger press, reload, and malfunction clearance trains the same muscle memory. But it runs on .22 LR, which costs a tiny fraction of 5.56, weighs about five pounds, and produces almost no recoil or noise. The threaded barrel takes a suppressor, the M-Lok handguard takes accessories, and the whole thing is as reliable as .22 rifles get with decent ammo.
How the M&P15-22 Shoots
On the range the M&P15-22 is pure, cheap fun, and a superb teacher. New shooters learn the AR platform without recoil or expense, experienced shooters run cheap drills that transfer directly to their centerfire ARs, and everyone enjoys plinking 25 rounds at a time. It is accurate enough for small game and steel out to reasonable ranges. The usual .22 caveat applies: it runs best on higher-velocity ammo like CCI and can get finicky with the cheapest bulk promo rounds. Keep it reasonably clean and feed it decent ammo, and it just runs. For the money, nothing trains the AR manual of arms this affordably.
S&W M&P15-22 Variants
The M&P15-22 comes in a few flavors to suit different shooters.
M&P15-22 Sport From ~$449
The full-size model with M-Lok handguard and flip-up sights. The best all-round trainer and plinker.
M&P15-22 (Compact/MOE) From ~$479
Shorter or Magpul-furniture configurations for smaller shooters and a lighter package.
M&P15-22 Performance Center From ~$549
Upgraded barrel and trigger from the Performance Center for the accuracy-minded plinker.
Where to Buy the S&W M&P15-22
The M&P15-22’s main rival is the traditional Ruger 10/22, the other great .22 rifle. The 10/22 is a lighter, more classic plinker with a deeper aftermarket, while the M&P15-22 wins for anyone who wants to train on the AR platform. If you own a centerfire AR-15, the M&P15-22 is the perfect low-cost training companion. Compare live prices below, and see the field in our best .22 LR rifles guide.
Who Should NOT Buy the S&W M&P15-22
- Traditional plinkers: if you don’t care about AR training and just want a classic .22, the Ruger 10/22 is lighter and has a deeper aftermarket.
- Any-ammo shooters: the M&P15-22 rewards decent high-velocity ammo. The cheapest bulk promo rounds may not cycle reliably.
- Centerfire-only buyers: if you want an actual AR-15 for defense or larger game, this is a .22 trainer, not a substitute.
- Premium-accuracy seekers: for bench-rest .22 accuracy, a dedicated bolt-action rimfire target rifle will out-shoot it.
The Verdict
The Smith & Wesson M&P15-22 is the best .22 AR-15 you can buy and one of the smartest trainers in the gun world. It delivers authentic AR ergonomics, high capacity, a threaded barrel, and real reliability for cheap .22 LR pennies per round, making it perfect for new shooters, AR owners, and anyone who just wants low-cost fun. A little ammo pickiness is the only real knock. If you own or plan to own an AR, this is the training partner to get. See how it stacks up in our best .22 LR rifles guide, or read our Ruger 10/22 review for the classic alternative.
Our Rating: 8.5 / 10 — the definitive .22 AR trainer, cheap, reliable, and genuinely fun.
S&W M&P15-22 FAQ
Is the S&W M&P15-22 a good rifle?
Yes. The M&P15-22 is the best-selling .22 LR AR-15 and one of the best trainers in the gun world, delivering authentic AR-15 ergonomics, 25-round capacity, a threaded barrel and real reliability for cheap .22 LR pennies per round.
Is the M&P15-22 a real AR-15 or a conversion?
It is a dedicated, purpose-built .22 LR rifle, not a conversion kit. It uses a blowback action but replicates AR-15 controls, so the safety, magazine release, bolt catch and charging handle all work like a centerfire AR.
How many rounds does the M&P15-22 hold?
The M&P15-22 uses 25-round magazines, giving it high capacity for a .22 rifle.
Is the M&P15-22 a good trainer for a real AR-15?
Yes, it is ideal. Because its controls and manual of arms match a centerfire AR-15, every reload, trigger press and malfunction clearance builds directly transferable muscle memory, at a fraction of the ammo cost.
M&P15-22 vs Ruger 10/22 - which is better?
The Ruger 10/22 is a lighter, more classic plinker with a deeper aftermarket, while the M&P15-22 wins for anyone who wants to train on the AR platform with authentic controls. For traditional plinking, the 10/22; for AR training, the M&P15-22.
Is the M&P15-22 ammo picky?
Like most .22 semi-autos, it runs best on higher-velocity ammunition such as CCI and can get finicky with the cheapest bulk promo rounds. Fed decent ammo, it is reliable.
Does the M&P15-22 have a threaded barrel?
Yes, the M&P15-22 has a 1/2x28 threaded barrel, so it readily accepts a suppressor or muzzle device.
How much does an S&W M&P15-22 cost?
Street prices for the S&W M&P15-22 typically run from about $450 to $500 depending on configuration.
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