The purpose of this training circular, Training Circular TC 3-23.30 Grenades and Pyrotechnic Signals, is to orient Soldiers to the functions and descriptions of hand grenades and pyrotechnic signals. It also provides a guide for the proper handling and throwing of hand grenades and pyrotechnic signals, suggests methods and techniques for the tactical employment of hand grenades and pyrotechnic signals, and provides a guide for leaders conducting hand grenade and pyrotechnic signal training. To lead the trainer through the material needed to conduct training during initial entry training (IET) and unit sustainment training, the publication provides the material divided into three main areas: Chapters 2 and 3 contain information about each munition. Chapter 4 covers training standards and qualification requirements. Chapter 5 discusses employment considerations for grenades and pyrotechnic signals. Additional subjects include hand grenade and pyrotechnic signal capabilities, mechanical training, and the fundamentals and principles of employing hand grenades and pyrotechnic signals. This publication revision incorporates the deletion of references to obsolete material and the inclusion of references to new material. Additional changes consist of- Changes and updates to technical information, as reflected in the appropriate munition reference. Replacement of common terms with their accepted modifications. Changes to the hand grenade qualification scorecard. A training program that ensures live-fire applications are scheduled after the Soldier has demonstrated preliminary skills. This publication prescribes DA Form 3517-R (Hand Grenade Qualification Scorecard). This publication applies to the Active Army, the Army National Guard (ARNG), National Guard of the United States (ARNGUS), and the United States Army Reserve (USAR). Terms that have joint or Army definitions are identified in both the glossary and the text. Terms for which TC 3-23.30 is the proponent TC are indicated with an asterisk in the glossary.