This book presents, for the first time, a comprehensive and up-to-date treatment of gun muzzle blast and flash. It describes the gas dynamics involved, modern propulsion systems, flow development, chemical kinetics, and reaction networks of flash suppression additives as well as historical work. In addition, the text presents data to support a revolutionary viewpoint of secondary flash ignition and suppression. The book is written for practitioners and novices in the flash suppression field: engineers, scientists, researchers, ballisticians, propellant designers, and those involved in signature detection or suppression.