The M84 was originally designed by the US Army over 25 years ago to aid in the safe return of hostages without injury or harm to them or their captures.
The M84 device is intended to confuse, disorient and momentarily distract potentially threatening or dangerous individuals. When initiated, the components within the M84 produce a blinding light that temporarily removes the subject's vision. The grenade also produces an intense "bang" at noise levels above 170 decibels that confuses the enemy and fills their ears with a deafening ringing.
Today, the M84 is not only used by the military but is also used by Swat, Police departments and video game enthusiasts worldwide, all of whom are very familiar with it’s effective ability to temporarily disorient and confuse a perpetrator.