The Chiappa Rhino 40DS is a double/single action .357 Magnum revolver built around a low bore axis design. Unlike conventional revolvers that fire from the top chamber, the Rhino fires from the bottom chamber of the cylinder, which lowers the bore axis relative to the shooter's hand and reduces muzzle rise. 
 

Key Specifications 

• Brand: Chiappa Firearms 
• Model: Rhino 40DS 
• Caliber: .357 Magnum 
• Action: Double/Single Action (DA/SA) 
• Capacity: 6 Rounds 
• Barrel Length: 4 inches 
• Overall Length: 8.5 inches 
• Weight: 1.9 lbs (29.9 oz) 
• Finish: Nickel-Plated (Brushed) 
• Sights: Adjustable Fiber Optic Rear / Fiber Optic Front 
   

Detailed Features 

 
The low bore axis is the functional heart of the Rhino's design. Firing from the bottom cylinder reduces the lever arm between bore and grip, which translates directly into lower felt recoil and less muzzle flip compared to a conventional revolver in the same caliber. This is measurable, not marketing. 
 
The hexagonal cylinder is a natural consequence of the firing geometry — it's not just visual. The fiber optic front sight paired with adjustable rear sights gives you a clear, customizable sight picture. The adjustable rear is a practical feature for a DA/SA revolver that gets used at varying distances. 
 
The snag-resistant hammer design makes it cleaner for holster draw, which matters for defensive carry. At 1.9 lbs, it's manageable for extended range sessions, though the unconventional grip angle takes some adjustment if you're coming from standard revolvers. 
 
The brushed nickel finish gives the 40DS a distinctive look and provides corrosion resistance appropriate for a carry or range gun.

The Chiappa Rhino 40DS in .357 Magnum draws strong reactions in both directions, mostly because of the unconventional design.

The low bore axis is the most-discussed feature, and most owners who've shot it report noticeably less muzzle rise compared to standard .357 revolvers — particularly appreciated in rapid DA fire. This isn't controversial; the physics are real and most owners confirm the effect.

The aesthetics divide opinion more sharply. Some owners are drawn specifically to the hexagonal cylinder and angular frame; others find it polarizing. Either way, it's distinctive, and the brushed nickel finish on the 40DS is generally well-received.

Trigger feel gets mixed but generally positive reviews. The DA pull is described as smooth and consistent by most owners; a smaller group feels it needs polish. SA pull is cleaner, as expected from any quality DA/SA revolver.

Weight and size relative to other revolvers comes up for buyers who expected the compact Rhino to be lighter. At 1.9 lbs it's in line with comparable steel-frame .357 revolvers, but it can feel bulkier due to the cylinder geometry.

Reliability reports are mostly positive. Occasional mentions of production variance come up, but the consensus is that individual guns have been dependable at the range and in defensive contexts.

Customization and comparison discussions are common — shooters compare it to S&W and Ruger .357 alternatives, usually landing on the Rhino when low bore axis and distinctive aesthetics matter more than conventional ergonomics.