What are the steps involved in the cycle of operation for a semi-automatic firearm?

The cycle of operation for a semi-automatic firearm is highly systematic and includes several critical steps that ensure the firearm functions properly after each shot is fired. The correct answer outlines the complete sequence of integrated mechanical processes that occur once the trigger is pulled.

Initially, the firearm goes through the firing stage, where the primer is struck by the firing pin, igniting the cartridge. This creates gas pressure that drives the bullet forward. Following this, the actions of unlocking, extracting, and ejecting take place, allowing the spent cartridge to be removed from the chamber and expelled from the firearm.

Next, the feeding process involves bringing a new round from the magazine to align it with the chamber. This is closely followed by the chambering step, where the round is pushed into the chamber, ensuring it is positioned correctly for the next shot. Ultimately, the unlocking mechanism ensures that the bolt locks back into place, ready to fire again when the trigger is pulled.

This detailed cycle is essential for the operation of semi-automatic firearms, distinguishing them from fully automatic models or manual-action guns, and it directly influences their reliability and performance in various shooting scenarios.