What does the forearm do on a pump-action firearm?

The forearm on a pump-action firearm serves a crucial function in the operation of the firearm. Its primary role is to move the ammunition from the magazine into the chamber, which is essential for the firing process. When the user pumps the forearm, it slides back and forth, first ejecting any spent cartridge and then chambering a new round from the magazine. This action is what allows the firearm to cycle through its ammunition efficiently.

This movement is integral to the firearm’s functionality, making it possible to prepare the firearm for shooting after each shot. Understanding the operation of the forearm is important for maintaining the firearm properly and ensuring safe handling while reloading and firing.

Other options, while they refer to aspects of firearm operation or handling, do not accurately describe the role of the forearm. For instance, the safety mechanism is usually a separate feature of the firearm, aiming relies on the placement of both the forearm and the shoulder, and the locking of the action is typically controlled by other components within the firearm. The distinct responsibility of the forearm in moving ammunition is what makes option C the correct choice.