The Smith & Wesson Model 351 Personal Defense is a DA/SA revolver chambered in .22 WMR with a 7-shot cylinder. At 11.2 oz and 6.2 inches overall, it is one of the lightest revolvers in the Smith & Wesson lineup. The aluminum frame has a matte black finish, and the HiViz orange dot front sight gives good visibility in a variety of light conditions. 
 

Key Specifications 

• Brand: Smith & Wesson 
• Model: Model 351 Personal Defense 
• Caliber: .22 WMR 
• Action: Double Action / Single Action (DA/SA) 
• Capacity: 7 rounds 
• Barrel Length: 1.88 inches 
• Overall Length: 6.2 inches 
• Weight: 11.2 oz 
• Finish: Matte Black Aluminum 
• Sights: HiViz Orange Dot Front / Fixed Notch Rear 
• Grip Material: Finger Grooved Wood 
   

Features 

The aluminum frame keeps weight to a minimum without sacrificing the revolver's structural integrity. The DA/SA action works both for quick double-action fire and deliberate single-action shots. The wood grips have finger grooves for a consistent hold. At 1.88 inches, the barrel is short enough to disappear into a jacket pocket or small holster. 
 

Performance 

.22 WMR is a step up from .22 LR, faster and with more energy out of a short barrel, though the caliber debate in a defensive context is a real one. The 7-round cylinder is an advantage over 5-shot .38 Special carry revolvers. Recoil is mild, which suits shooters who want a training-friendly defensive option.

Owners of the Model 351PD have clear and consistent views on what the gun does well and where its limitations are.

Carryability is the primary appeal. At 11.2 oz, it is genuinely light enough to carry in a pocket all day without discomfort. Most owners who buy it do so specifically because nothing else in the revolver category comes close in this weight class.

Recoil is minimal. .22 WMR is easy to shoot accurately, and most owners report that new shooters adapt to this gun quickly. Extended practice sessions are comfortable.

Smith & Wesson's build quality gets consistent praise. The revolver runs reliably with .22 WMR and owners report no significant mechanical issues.

The simplicity of revolver operation is mentioned as a benefit for people who want a straightforward manual of arms.

On the negative side, the .22 WMR's effectiveness as a primary defensive caliber is the most common debate point. Some owners are comfortable with it as a backup or supplemental carry option; others feel it falls short compared to even .38 Special +P. This is a genuine tradeoff that comes with choosing the lightest possible package.

Seven rounds gets some criticism compared to higher-capacity semi-autos, though owners generally accept this as part of what the revolver platform offers.

Price relative to performance is occasionally questioned, with some buyers feeling there are more capable defensive revolvers at similar or lower prices.