This book is a quick reference training guide for all owners of M16/M4/AR15 rifles. It stems from the author's more than 20 years of shooting experience using the M16/M4 series weapons for sport, training and combat. This handbook is not filled with “nice to know”, but only “need to know” information and can be used as a guide for classes prior to range operations, or as a quick reference when operationally deployed. It gives the “what” and “how” but also the “why” necessary to teach the proper operation and employment of the M16/M4 weapon system. Areas covered include: ballistics, malfunctions, maintenance, and sight adjustments of commonly issued optics.