Which step is performed first when transitioning from Condition 3 to Condition 1?

When transitioning from Condition 3 to Condition 1 with the M16A3/M4A1 Service Rifle, the first step is to pull the charging handle fully to the rear. This action is critical because it allows for the bolt to be drawn back, enabling the shooter to inspect the chamber to ensure it is clear before proceeding to load a round.

Pulling the charging handle back also prepares the weapon for loading by allowing a round to be chambered when the magazine is inserted later in the process. Ensuring a clear chamber is a fundamental safety measure, as it confirms there is no live round and helps prevent accidental discharges.

In contrast, inserting a magazine into the magazine well typically follows this step, as you must first ensure the weapon is clear and ready before adding ammunition. Locking the bolt to the rear is typically done when clearing the weapon or in specific operational contexts, but it is not the first step in this transition. Ensuring the selector lever is in the safe position is always a crucial safety protocol, but in this context, it isn't the first step for transitioning between these specific conditions.