What safety measure is emphasized in the conditions of the M16A2?

The emphasis on having the safety on when handling the M16A2 is crucial for preventing accidental discharges and ensuring the safety of personnel. This measure is fundamental to weapon handling protocols in the Marine Corps, as it directly addresses the immediate risk involved with carrying and operating firearms.

When the safety is engaged, it mechanically prevents the weapon from firing, even if the trigger is pulled. This is especially important in high-stress situations or when the weapon is being transported, as it provides an additional layer of safety for the user and others nearby. This practice is ingrained in the training of Marines, highlighting the importance of maintaining control over the weapon at all times.

Other safety measures, while important, may not provide the immediate, active control over the weapon that having the safety on does. Keeping the weapon clean, using proper ammunition, and ensuring proper storage are all essential steps in the overall maintenance and operation of the M16A2, but they do not address the critical aspect of accidental firing in the moment. Therefore, engaging the safety is treated as a primary protocol in handling the M16A2.