What is the definition of a firearm?

The definition of a firearm fundamentally describes it as a mechanical device designed specifically to propel a projectile. This involves the use of gunpowder or another form of explosive to launch bullets or shells at high velocity. Firearms are distinct from other tools or devices because their primary function is the act of firing a projectile, which typically has implications for hunting, target shooting, or self-defense.

The other choices describe different types of equipment not associated with firearms. For instance, a tool used for fishing pertains to angling and does not involve the mechanics of projectile propulsion. Similarly, archery devices rely on tension and release of stored energy rather than explosive force. Describing firearms as recreational items for sports is too broad and does not capture the specific mechanical function that qualifies them as firearms. Thus, identifying the essence of a firearm as a mechanical device that propels a projectile is the key element that distinguishes it from other equipment and activities.