What is the maximum effective range of the M16A3 service rifle in meters?

The maximum effective range of the M16A3 service rifle is indeed 550 meters. This figure is based on the rifle's design and capabilities, specifically its accuracy and the ballistic characteristics of the 5.56x45mm NATO cartridge it fires. The M16A3 maintains a high level of accuracy and lethality up to this distance, allowing a skilled marksman to effectively engage targets.

This range not only reflects the rifle's optimal performance but also takes into consideration factors such as standard combat conditions, environmental influences, and the typical engagement scenarios. Beyond 550 meters, although the rifle can still fire projectiles, the effectiveness in terms of hitting targets consistently decreases due to factors like bullet drop, wind drift, and the physiological limitations of aiming accurately at greater distances.