A stun grenade, also known as a flash grenade, flashbang, thunderflash, or sound bomb,[1] is a non-lethal explosive device used to temporarily disorient an enemy's senses. Upon detonation, a stun grenade produces a blinding flash of light and an extremely loud "bang". They are often used in close-quarters combat, door breaching, and riot control, typically to stun enemies or distract them.[2]
Originally developed to simulate explosions during military training, stun grenades were first used by the British Army Special Air Service's counterterrorist wing in the late 1970s,[3][4] and have been used by police and military forces worldwide since.[5]
Despite their less-lethal nature, stun grenades are still capable of causing harm, and can injure or kill when detonating in close proximity. They are also capable of sparking fires.[6]