What is the function of the forward assist assembly in the M16/A2?

The forward assist assembly in the M16/A2 serves a critical function in ensuring that the bolt fully closes during the firing cycle. This mechanism provides a tactile way for the soldier to manually push the bolt into its locked position if it fails to close completely on a cartridge, ensuring reliable firing of the weapon.

In many situations, especially those involving sand, mud, or other debris, a round may not chamber completely due to external factors. The forward assist allows soldiers to keep the weapon operational without needing to remove the magazine and clear the chamber. By pressing the forward assist, the soldier uses a small lever to ensure the bolt engages properly with the round, thereby increasing the reliability of the firearm in adverse conditions.

The other options relate to functions that are outside the purpose of the forward assist. For instance, carrying the weapon, improving accuracy, and facilitating magazine changes do not pertain directly to the role of the forward assist assembly. Rather, these aspects are managed by other components and practices associated with firearm handling and operation.