What offense is committed when someone steals a revolver worth $600 from a friend's house?

The offense committed when someone steals a revolver worth $600 from a friend's house is classified as theft of a firearm. This is because the act involves the unlawful taking of someone else's property, specifically a firearm, with the intent to permanently deprive the owner of it.

The theft of a firearm is treated distinctly due to the potential risks and regulations surrounding firearms, emphasizing the seriousness of such an offense. In this scenario, the revolver is explicitly highlighted, which directly ties to the classification of the crime. The monetary value of the weapon also reinforces the notion of theft, since the value greatly influences the seriousness of the charge, potentially leading to increased penalties.

Other options, such as burglary, typically involve illegally entering a structure with the intent to commit a crime therein, while robbery generally requires the use of force or intimidation to take property from someone immediately. Assault involves causing physical harm or threatening harm to another individual. In this situation, the description fits most accurately with the offense of theft of a firearm.