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- "Designed for high damage at a short-medium range, the vertically inverted barrel alignment naturally reduces muzzle rise and recoil."
— In-game description
The Keratos .357 is a handgun featured in Tom Clancy's Rainbow Six Siege. It was introduced in the Operation Para Bellum expansion and is available for use by both GIS Operators and the NIGHTHAVEN Operator Wamai.
The Chiappa Rhino is a revolver produced by Chiappa Firearms of Italy. It is chambered for .357 Magnum, 9mm Parabellum, .40 S&W, or 9×21mm cartridges. The Rhino's most distinctive feature is that the barrel is on a low axis compared to other revolvers. The Rhino fires from the lowermost chamber of the cylinder, rather than firing from the topmost chamber.
In-game, designated as the Keratos .357, this revolver is functionally similar to the GIGN's LFP586, with exception to its ability to equip barrel attachments. As such, like the LFP586, it can kill any Operator in two shots at its optimum range, regardless of their Armor Type.
Alongside this damage is the relatively low recoil kick that allows the user to take advantage of its high, long-range damage. Overall, the Keratos .357 is suited for any range of engagement, if only held back by its low six rounds capacity.
- Keratos means "Horn" in Greek, a nod to the revolver's actual name, Chiappa Rhino, as its namesake is known for their horns.
- In reality, a revolver such as the Keratos wouldn't be able to use a suppressor effectively. When fired, expanding gas escapes the gap between the cylinder and the frame, which would create a large noise regardless of whether or not a suppressor is attached to the muzzle.
- The Ember Rise Operator Balancing notes refer to the weapon as the "Rhino-40".