What is the FM number associated with the M16/A2 Rifle?

The correct FM number associated with the M16/A2 Rifle is identified as FM 3-22.9/ADP 3-09. This field manual provides comprehensive information on the M16 series rifles, including technical details, operational capabilities, and guidelines for training and maintenance. The inclusion of the ADP (Army Doctrine Publication) number indicates its alignment with broader Army doctrines related to combat and warfare strategies. This helps soldiers understand not only the mechanics of the weapon but also its role within the larger context of unit operations and mission planning. Understanding this manual is crucial for effective weapon handling and operational readiness in various scenarios.