What is the main difference between semi-automatic and fully automatic firearms?

The main difference between semi-automatic and fully automatic firearms lies in how they fire and operate in relation to the trigger. Semi-automatic firearms are designed to fire one round with each pull of the trigger. After firing, the action automatically cycles to load the next round into the chamber, but the shooter must release and pull the trigger again to fire subsequent rounds. This mechanism allows for controlled and deliberate shooting, making it ideal for various applications including sport shooting and personal defense.

In contrast, fully automatic firearms continuously fire rounds as long as the trigger is held down, allowing for rapid fire without needing to pull the trigger for each round. This distinction significantly affects their use and regulation, with fully automatic firearms generally being subject to stricter legal controls than semi-automatic ones.

Recognizing this difference is crucial for understanding firearm functionality and safety practices. This is why option A accurately captures the essential operational characteristic that separates semi-automatic firearms from fully automatic ones.