What is the first step in disassembling a weapon?

The first step in disassembling a weapon is to clear the weapon. This crucial action ensures that the firearm is safe to handle by removing any ammunition, which prevents accidental discharge and promotes safety during the disassembly process. Clearing the weapon involves ensuring that the chamber is empty, the magazine is removed (if applicable), and that there are no rounds in the feed mechanism. This foundational safety measure is critical in any firearms handling procedure and establishes a safe environment for further maintenance activities, such as inspection or cleaning.

The other options, while important parts of the overall procedure, should only be performed once the weapon has been cleared. Checking the ammunition or inspecting the barrel do not come before ensuring safety, and removing the bolt is a step that would follow clearing the weapon. Therefore, focusing on clearing the weapon first aligns with standard safety protocols in firearms handling.