The M240 is a gas-operated, belt-fed, air-cooled, fully automatic weapon that fires from the open-bolt position. The weapon system has a standardized mounting surface for various optics, pointers, illuminators, and equipment, to secure those items with common mounting and adjustment hardware.
Training Circular (TC) 3-22.240 is comprised of nine chapters and six appendices, and is specifically tailored to the individual Soldier’s use of the M240-series medium machine gun (MMG). It provides specific information about the weapon, aiming devices, attachments, followed by sequential chapters on the tactical employment of the weapon system.
TC 3-22.240 is organized in a progressive manner, each chapter or appendix builds on the information from the previous section. This organization provides a logical sequence of information which directly supports the Army’s training strategy for the weapon at the individual level.
Chapters 1 through 4 describe the weapon, aiming devices, mountable equipment, and accessories associated with the weapon. General information is provided in the chapters of the manual, with more advanced information placed in appendix A, Ammunition, and appendix B, Ballistics.
Chapters 5 through 9 provide the employment, stability, aiming, control and movement information. This portion focuses on the Soldier skills needed to produce well-aimed bursts. Advanced engagement concepts are provided in appendix C of this publication. Appendix D of this publication provides common tactical drills that are used in training and combat that directly support tactical engagements. Finally, appendix E of this publication provides a common location for reference in this and future weapons publications.