The Smith & Wesson M&P 5.7 is a semi-automatic pistol chambered in 5.7x28mm. The gas-operated locked-breech system, 5-inch barrel, and 22+1 capacity distinguish it from most handguns in its size class. At 26.70 oz (1.67 lbs), the polymer frame over stainless steel slide keeps weight manageable. Two 22-round magazines are included. 
 

Key Specifications 

• Brand: Smith & Wesson 
• Model: M&P 5.7 
• Caliber: 5.7x28mm 
• Barrel Length: 5 inches 
• Capacity: 22+1 rounds (two 22-round magazines included) 
• Weight: 26.70 oz (1.67 lbs) 
• Finish: Flat Dark Earth Cerakote / Black Armornite 
• Frame Material: Polymer 
• Slide Material: Stainless Steel 
• Safety Features: No manual thumb safety 
   

Detailed Features 

The gas-operated locked-breech action is unusual for a handgun at this size -- it manages the higher operating pressure of the 5.7x28mm cartridge while keeping felt recoil lower than a comparable blowback design would. The threaded muzzle allows suppressor or compensator attachment. The optic-ready slide cut accepts red dot sights without an adapter plate. The reversible magazine release accommodates both-handed operation. The FDE Cerakote frame contrasts with the black Armornite slide. 
 
The 5.7x28mm caliber produces significantly higher velocity than 9mm from the same barrel length, with correspondingly lower felt recoil, which is why many shooters specifically seek it out. The 22+1 capacity is notably higher than most handguns in any caliber.

The M&P 5.7 gets a positive overall reception, with the caliber and capacity as the central selling points driving most purchases.

Reliability during range sessions is consistently noted, and the low recoil of the 5.7x28mm round is specifically called out as a meaningful advantage -- multiple owners contrast it favorably with 9mm for sustained shooting. The 22+1 capacity and optic-ready configuration are seen as practical strengths, and the FDE/black color combination is liked for its appearance.

The main friction points: 5.7x28mm ammunition costs more than 9mm and is less widely stocked, which comes up in nearly every price discussion. Some owners who primarily want a defensive pistol question whether the caliber offers better terminal performance than major conventional rounds. Aftermarket accessory options are more limited than for the highest-volume platforms, though ownership rates have grown since launch. The price-to-value debate is active, with some seeing it as fair given the features and others preferring less expensive options.