This book is a quick reference for military personnel conducting range training. It stems from the author’s more than 20 years of shooting experience using the M16/M4 series weapon for support, 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 give 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 adjustment for commonly used optics.