What is typically the first action taken during remedial action?

The first action taken during remedial action is to remove the magazine. This is a crucial step because it ensures that no additional rounds can be fed into the chamber, which prevents any further malfunction or unintended discharge while you assess and address the issue with the weapon. Removing the magazine establishes a safer environment for inspection and troubleshooting without the risk of introducing any further ammunition into the weapon during the initial phases of remedial action.

The other options, while they may be relevant in different contexts, do not provide the immediate safety and security needed during the initial assessment of a malfunction. Locking the bolt to the rear, inspecting the barrel, or changing the firing position are important parts of remedial action, but they follow the critical step of ensuring that the weapon is cleared of ammunition. This foundational action sets the stage for subsequently diagnosing and resolving any issues with the firearm.