This is the very popular 12 Gauge 2 3/4" Military Grade Flash Bang round. The Military Grade Flash Bang produces a 180+ decibel blast with a very intense blinding white flash out of the end of your barrel. Used for door and window breaching where a stun round is applied. Our blanks and flash bangs are tested on the same equipment/system used by the U.S. military. The system is made in the U.S.A. Not a cheap hand held meter made in China. This is a Military Grade Flash Bang not a standard blank. It is the most effective round of its type made today. *Do not shoot indoors.