The 
Chiappa Rhino 30DS CO2 Revolver is a compact, officially licensed replica of the Italian Chiappa Rhino .357 Magnum, featuring the signature low bore axis and a 3-inch barrel. It is available in both 6mm Airsoft and .177 (4.5mm) airgun versions, constructed with a full metal body and imitation wood grips
 
According to manufacturers and retailers like BO Manufacture , the technical specifications for the 30DS model are as follows:
Operation: Powered by a single 12g CO2 cartridge housed in the grip.
Action: Features both Single and Double Action.
Capacity: Uses a 6-round rotating cylinder with individual metal shells.
Length & Weight: Total length is approximately 190mm (7.5 inches), weighing roughly 771g to 860g depending on the specific caliber variant.
Velocity: The Airsoft version is typically tuned to approximately 0.95 Joules for field legality.
Special Features: Includes a functional fire status indicator (red rod) that pops up when cocked and adjustable fiber optic rear sights