A stun grenade, also known as a flash grenade, flashbang, thunderflash or sound bomb, is a less-lethal explosive device used to temporarily disorient an enemy's senses. It is designed to produce a blinding flash of light of around 7 megacandela and an intensely loud "bang" of greater than 170 decibels.

What does a flash grenade do?

Also known as stun grenade, a flash-bang is a non-lethal explosive device that emits an extremely loud bang and bright lights to disorient people as it goes off. They can cause temporary blindness and shifts in hearing, typically lasting a few seconds, per a paper in the American Journal of Operations Research.

Is it illegal to have flash grenades?

Actual flashbangs produced for military and law enforcement use are classified as destructive devices by the ATF and are not available on the commercial market. They typically consist of an explosive charge and fuse mechanism inside a steel or aluminum grenade body.