Which of the following describes a revolver?

A revolver is best described as a hand-held firearm with a rotating cylinder. This unique design allows the revolver to hold multiple rounds of ammunition in individual chambers within the cylinder. When the trigger is pulled, the cylinder rotates to align a chamber with the barrel, allowing the gun to fire. This characteristic distinguishes revolvers from other firearm types, such as semi-automatic pistols, which typically use a magazine to hold and feed ammunition.

The other descriptions do not accurately encapsulate the mechanics or features of a revolver. For instance, a firearm with a removable magazine is more representative of semi-automatic or automatic firearms, while a firearm that fires multiple rounds sequentially applies to both semi-automatic and automatic firearms rather than specifically describing revolvers. Likewise, while rifled barrels are common in both revolvers and many other types of firearms, this attribute alone does not specifically define what a revolver is.