The Smith & Wesson Model 66 Combat Magnum is a K-Frame double/single action revolver chambered in .357 Magnum, with the ability to also fire .38 S&W Special +P. The 4.25-inch stainless steel barrel sits in a matte stainless frame, and the adjustable rear sight with white outline pairs with a red ramp front sight for target work under varied lighting. The black synthetic grip reduces felt recoil and holds up to hard use. 
 

Key Specifications 

• Caliber: .357 Magnum / .38 S&W Special +P 
• Action: Single/Double Action 
• Capacity: 6 Rounds 
• Barrel Length: 4.25 inches 
• Overall Length: 9.6 inches 
• Weight: 36.9 oz 
• Frame Material: Stainless Steel 
• Frame Finish: Matte Stainless 
• Sights: Red ramp front / white outline adjustable rear 
• Grip: Black Synthetic 
   

Detailed Features 

The K-Frame strikes a balance between full-size power and manageable dimensions that has made it a long-running choice for both law enforcement and civilian users. The 4.25-inch barrel is long enough to develop good velocity from .357 Magnum loads without making the revolver awkward to carry or holster. The matte stainless finish resists corrosion in wet or humid conditions and avoids the reflectivity of polished steel. 
 
The adjustable rear sight is a meaningful addition for a revolver intended for target shooting. You can compensate for different ammunition loads rather than re-learning holdover. The internal lock safety adds a layer of security during transport. 
 

Usage Scenarios 

• Home defense, where .357 Magnum stopping power and a 6-round cylinder cover most scenarios. 
• Target shooting and competitive events that permit revolvers, where the adjustable sights and crisp trigger are useful tools. 
• Daily carry for those who prefer a revolver over a semi-automatic.

The S&W Model 66 Combat Magnum gets steady positive feedback from revolver shooters. The matte stainless finish is widely appreciated for its practicality, corrosion-resistant and low-glare without looking stripped down. Trigger feel is a frequent highlight; most owners describe it as smooth in double action and clean in single action, with accuracy that holds up well at typical handgun distances.

The weight at 36.9 oz comes up in discussions about carry. It is on the heavier side for an everyday carry revolver, which matters to some and not at all to others. The 6-round capacity compared to modern semi-automatics is another point some buyers note before choosing. Neither complaint tends to be a dealbreaker for people who specifically want a .357 revolver, and the Model 66 holds a respected position in that category.