What type of safety feature does the M16A3/M4A1 service rifle incorporate?

The M16A3/M4A1 service rifle incorporates a selector lever as a key safety feature. This lever allows the shooter to select between different firing modes, typically safe, semi-automatic, and automatic (or burst, in some models). By setting the rifle to the “safe” position, the shooter prevents the rifle from discharging, effectively locking out the trigger mechanism.

This feature is crucial for maintaining firearm safety and control, ensuring that the rifle is only fired when the operator intends to do so. Additionally, the design of the selector lever helps to mitigate negligent discharges, contributing to overall safety during handling and operation of the firearm.

While other options might present valid safety features in some contexts, the selector lever is specifically integral to the functionality and safety protocols associated with the M16A3/M4A1 service rifles, defining their operation and responsible usage.