The Smith & Wesson M&P 22 Magnum is a semi-automatic pistol chambered in .22 WMR. It ships with two 30-round magazines, giving it 30+1 on-board capacity, high for a rimfire pistol of this size. At 22 oz and 8.4 inches overall, it's a full-size handgun, not a pocket gun. 
 

Key Specifications 

• Manufacturer: Smith & Wesson 
• Model: M&P 22 Magnum 
• Caliber: .22 WMR 
• Barrel Length: 4.35 inches 
• Overall Length: 8.4 inches 
• Capacity: 30+1 rounds 
• Weight: 1.4 lbs (22 oz) 
• Frame Material: Black Polymer 
• Slide Material: Stainless Steel with Armornite Finish 
• Front Sight: Green Fiber Optic 
• Rear Sight: Black Notched 
• Grip Type: Textured 
• Action Type: Internal hammer, gas-operated 
   

Detailed Features 

The gas-operated action cycles the .22 WMR reliably without the manual-racking issues that plague blowback rimfire designs at this caliber. The stainless steel slide has an Armornite finish for corrosion resistance. Green fiber optic front sight aids target acquisition in variable lighting. The textured polymer grip follows standard M&P ergonomics, familiar if you've used other guns in that family. 
 

Target Audience 

A practical choice for small game hunters who want more energy than .22 LR without moving to a centerfire pistol. Also useful as a low-cost training platform for shooters who want M&P controls and ergonomics but prefer the cheaper per-round cost of rimfire magnum ammo. 
 

Usage Scenarios 

• Small game hunting where the .22 WMR offers more reach and terminal performance than .22 LR 
• Extended range sessions where the 30+1 capacity reduces reload frequency 
• Home or property defense in rural settings where .22 WMR is the available caliber

Owner feedback on the M&P 22 Magnum is generally positive, with the high capacity and .22 WMR chambering drawing the most comment.

The 30-round magazine is the feature owners mention most. For a rimfire pistol this gives more time shooting before reloading, which matters for training and plinking. Most owners are satisfied with how the magazines feed and seat.

The gas-operated action gets credit for cycling a wider range of .22 WMR loads than comparable blowback designs. That said, a number of owners report feeding and ignition issues with specific budget ammunition brands. Using quality brass-cased loads largely resolves this.

Build quality is well-regarded. The Armornite-coated slide and M&P-series fit and finish receive consistent positive mention. The polymer frame is standard for the platform and owners don't flag it as a weakness.

Accuracy at typical pistol distances is good. Shooters using it for target practice and small game report satisfying results from the 4.35-inch barrel.

The .22 WMR caliber itself generates debate. Some owners bought it specifically for its step up in energy over .22 LR; others find the ammo more expensive and less available than they expected. It's worth checking local supply before committing.

Maintenance notes: some owners flag that certain loads leave more fouling in the action than others. Regular cleaning after a session keeps cycling smooth.

This pistol is simply a lot of fun to shoot. Accuracy has been excellent, and mine has handled everything I have fed it so far without complaint. That dependable appetite is the part that stands out most, since I can concentrate on enjoying the pistol instead of wondering whether a particular load will cause trouble. The combination of easy enjoyment, strong accuracy, and trouble-free function has made every outing with it a positive one.