The Smith & Wesson Model 66 Combat Magnum is a compact DA/SA revolver chambered in .357 Magnum / .38 S&W Special +P. It holds 6 rounds, has a 2.75" barrel, measures 7.8" overall, and weighs 33.5 oz. The stainless steel construction resists corrosion and the satin finish handles field use without showing wear too quickly. 
 

Key Specifications 

• SKU: 179400100 
• UPC: 022188868005 
• Brand: Smith & Wesson 
• Model Name: Model 66 Combat Magnum 
• Type: Revolver 
• Class: Compact 
• Action: Double Action / Single Action 
• Caliber: .357 Magnum / .38 S&W Special +P 
• Capacity: 6 rounds 
• Barrel Length: 2.75 inches 
• Overall Length: 7.8 inches 
• Weight: 33.5 oz (approx. 2.1 lbs) 
• Finish: Stainless Steel 
• Grip Material: Synthetic 
• Sights: 
  • Front Sight: Red Ramp 
  • Rear Sight: Adjustable Black Blade 
     

Detailed Features 

 
The adjustable rear sight pairs with a red ramp front for a clear sight picture in varying light. The ball-detent lock-up keeps the cylinder-barrel gap tight, which contributes to accuracy. The two-piece barrel design improves structural rigidity, and the full-length extractor rod clears all six cases in one stroke, important during a timed reload. 
 
The 2.75" barrel is long enough for a reasonable sight radius while keeping the overall package compact enough for concealed carry. At 33.5 oz, it's heavier than a comparable J-frame but that weight helps absorb .357 Magnum recoil. Shooters who run .38 Special for training and .357 for carry will find the two calibers work interchangeably. 
 

Usage Scenarios 

• Concealed Carry: The compact dimensions work for holster carry, and the stainless finish handles sweat and moisture without rusting. 
• Home Defense: 6 rounds of .357 Magnum covers most defensive scenarios, and the DA trigger gives a consistent pull from a safe holstered condition. 
• Sport Shooting: The adjustable rear sight lets you zero for your preferred load, which is useful for outdoor range work.

Discussions around the S&W Model 66 Compact Magnum in .357 reflect the reputation that the L-frame revolver has built over decades.

Build quality and design get consistent praise. The stainless finish is appreciated for both durability and corrosion resistance. The Model 66 is well-regarded for its smooth DA/SA trigger. Many shooters describe it as one of the better factory revolver triggers available. Accuracy is reported as solid at both range sessions and in defensive applications.

The main criticism is weight. At 33.5 oz, it's heavy for a 2.75" revolver, which makes extended carry less comfortable than lighter alternatives. Some owners who carry it all day note the heft becomes noticeable by afternoon. Ammunition selection comes up frequently, .357 Magnum for full power and .38 Special for practice, with opinions varying on which makes more sense for different situations. The adjustable sight rear is a feature some shooters appreciate and others find unnecessary on a compact carry gun.