Which Field Manual would you refer to for guidance on the M4 carbine?

The reference to FM 3-22.9 is correct as it provides comprehensive guidance on the M4 carbine. This Field Manual covers various aspects of the weapon, including its characteristics, capabilities, operation, maintenance, and training procedures. It serves as an essential resource for Soldiers to understand how to effectively use and care for the M4 carbine, which is a standard issue weapon in the Army.

Additionally, the other Field Manuals mentioned do not focus specifically on the M4 carbine. For example, FM 3-11.4 deals with chemical, biological, radiological, and nuclear operations, FM 3-25.26 focuses on map reading and land navigation, while FM 4-25.11 is concerned with the Army's health and nutrition. These topics, while critical to military operations and soldier readiness, do not provide the specific information required for proficient handling and understanding of the M4 carbine.