The M4 Carbine has been the standard U.S. military service weapon for decades, trusted by Soldiers, Marines, Airmen, and Sailors around the world. This official operator’s manual, TM 9-1005-319-10, provides detailed instructions for the use, care, and maintenance of the M16A2/A3/A4 rifles and M4/M4A1 carbines. Covering everything from basic operation and safety procedures to troubleshooting, unusual climate considerations, and preventive maintenance, this manual is the definitive reference for anyone seeking authentic U.S. military guidance on the M4 and M16 series. It includes: Equipment description and data Loading, firing, and zeroing procedures Function checks and remedial action steps Preventive maintenance and lubrication schedules Instructions for operation in arctic, desert, jungle, and wet environments Troubleshooting and corrective action procedures This Milstar Books reprint preserves the complete, unabridged text and illustrations of the June 2010 edition, prepared by the U.S. Army, Air Force, and Navy. Presented in a convenient 6x8 format, it is designed for study, reference, and field use by military professionals, firearms enthusiasts, collectors, and historians. Whether you are a student of modern military doctrine, a professional instructor, or a responsible owner of AR-platform rifles, this manual provides the authoritative source on how America’s armed forces operate and maintain their most widely used small arms.