The Charter Arms Double Dog is a revolver chambered for .357 Magnum and 9mm with a 4.2-inch ported barrel and a 5-round cylinder. The grip is black wood. 
 

Key Specifications 

• Brand: Charter Arms 
• Model: Double Dog 
• Caliber: .357 Magnum / 9mm 
• Capacity: 5 rounds 
• Barrel Length: 4.2 in 
• Color/Finish: Black Wood 
   

Detailed Features 

• Dual-caliber chambering: .357 Magnum and 9mm 
• 4.2-inch ported barrel to reduce muzzle rise 
• 5-round cylinder 
• Black wood grips

Owners of the Double Dog point to the dual-caliber capability as the standout reason to pick it over a single-caliber revolver. Running 9mm for practice and .357 Magnum for carry loads from the same cylinder is a practical arrangement, and most report the transition works without issues.

The ported barrel generates polarized reactions. Shooters who prioritize control appreciate the reduced flip; those who shoot in low-light conditions note the added flash and blast from the ports. The 4.2-inch length puts it at a compact size for a .357.

Charter Arms occupies a utilitarian corner of the revolver market. The Double Dog trigger is a common discussion point, with some owners finding it acceptable from the factory and others recommending a professional action job to bring it where they want it.