What FM is associated with the M249 light machine gun?

The correct association of FM with the M249 light machine gun is outlined in FM 3-22.68, which serves as the official field manual for this particular weapon system. This manual provides comprehensive guidance regarding the operational employment, maintenance, and training associated with the M249.

In this context, FM 3-22.68 offers detailed instructions on the M249’s capabilities, characteristics, and ammunition types, helping soldiers understand how to effectively utilize the weapon in various operational scenarios. The manual is essential for ensuring that units are able to maximize the performance and effectiveness of the M249 on the battlefield, including aspects related to firing techniques, tactical employment, and troubleshooting.

The other field manuals listed pertain to different weapon systems and training protocols, which do not apply to the M249 specifically. Thus, FM 3-22.68 is the correct reference for training and operational guidance on the M249 light machine gun.