The Chiappa Rhino 40DS is a DA/SA revolver chambered in .357 Magnum / .38 Special with a 4" barrel, 6-round cylinder, and an aluminum alloy frame. The defining feature is the bottom-cylinder bore axis. The round fires from the 6 o'clock position rather than the top of the cylinder, which lowers the bore line and reduces muzzle rise on firing. 
 

Key Specifications 

• Model: Rhino 40DS 
• Caliber: .357 Magnum / .38 Special 
• Barrel Length: 4 inches 
• Capacity: 6 rounds 
• Weight: 1.9 lbs (29.9 oz) 
• Finish: Black Anodized 
• Grip: Walnut 
• Action Type: Double/Single Action (DA/SA) 
• Sights: Fiber Optic Front (red), Adjustable Rear (green) 
   

Features 

The aluminum alloy frame keeps weight at 29.9 oz while maintaining structural integrity. The fiber optic sights (red front, green rear) make target acquisition fast in varied lighting. The adjustable rear sight lets you fine-tune for your load. The walnut grip looks good and fits most hand sizes, though it's a non-standard shape compared to conventional revolvers. 
 
The bottom-cylinder design genuinely works: muzzle rise is reduced, which speeds up follow-up shots and makes .357 Magnum more controllable than it would be in a traditional frame. 
 

Usage 

For competition, the low muzzle rise and quick sight picture work well for stages requiring speed. It's compact enough for concealed carry if you don't mind the unconventional profile. For home defense, .357 Magnum at 6 rounds is a capable combination.

The Rhino 40DS splits opinion along predictable lines. Shooters who appreciate the engineering behind the bottom-bore-axis design tend to be enthusiastic owners. Those who prefer conventional revolver ergonomics often find the grip shape takes adjustment.

The recoil reduction is real and gets consistent credit. Running .357 Magnum in the Rhino is noticeably more manageable than in a traditional-frame revolver of similar weight, which makes it practical for extended range sessions or follow-up shot speed.

The black anodized finish with walnut grips gets favorable comments on appearance. It does look different from standard revolvers, which appeals to a lot of buyers.

The 4" barrel hits a middle ground that works for range shooting and self-defense without being awkward in either role. Performance on .357 Magnum and .38 Special is reliable for most owners.

Grip ergonomics divide people. Some find it fits their hand naturally; others need time to adapt from conventional revolver geometry. Quality control has come up in scattered discussions, with occasional reports of issues on specific units, so inspection on purchase is worth doing.

Price sits above many comparable revolvers, which some feel is justified by the unique design and others find hard to accept against more established brands. It has a dedicated following for a reason, but it's not the right fit for everyone.