This book is a quick reference training guide for all owners of HK-416 rifles. It stems from the author’s more than 20 years of shooting experience using military assault rifles of all types 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 HK-416 weapon system. Areas covered include: ballistics, malfunctions, maintenance, and sight adjustments of commonly issued optics.