12 Guage 2 3/4″ Military Grade Flashbang. These rounds produce a 170 Decibel Blast with a very intense Blinding Flash out of the end of your barrel, used for door and window breaching. This is a Military Grade Flashbang not a standard blank. Do Not Shoot Indoors. Fire Hazard. 5 Round Pack, 2 3/4″ Round.