As a guide in presenting instruction with the M16A1 and M16A2 rifle, this manual contains a detailed description of the rifle and its general characteristics, procedures for disassembly and assembly, operation and functioning of the rifle, types of stoppages and action to reduce them, types of ammunition, maintenance, fundamentals of rifle marksmanship, battle-sight zero, field firing, target detection, quick fire technique, record fire and infantry squad designated marksman training. This manual is also applicable for use with the M16A3/A4 and M4 Carbine rifles.