4-F classification

The 4-F classification is a system used to categorize firearms based on four key features: Function, Frame, Fire mechanism, and Firearm type. It helps identify and differentiate guns by examining how they operate, their physical structure, the way they ignite the ammunition, and their overall category (e.g., rifle, pistol). This classification aids law enforcement, manufacturers, and enthusiasts in understanding and managing firearms more systematically. Essentially, it provides a standardized way to describe a gun’s main characteristics for safety, regulation, and design purposes.