The 
Chiappa Rhino 40DS Co2 revolver with a 4-inch black barrel is a highly realistic replica available as either a 6mm airsoft gun or a 4.5mm/.177 caliber BB pistol.
 
Specifications and Features
The Chiappa Rhino 40DS Co2 revolver is an officially licensed replica designed to mimic the weight, dimensions, and handling of the actual firearm. 
Feature 
Detail
Action
Single and double action
Power Source
12g CO2 cartridge
Construction
Full metal body and barrel
Barrel Length
4 inches (102mm)
Overall Length
8.5 inches (215mm)
Weight
Approx. 1.8 lbs (850g)
Capacity
6-round cylinder, uses realistic shells
Grips
Faux wood grain with an integrated CO2 key