Valken Tactical Thunder B Flash Bang Cover Airsoft Grenade TheValken Tactical Thunder Bsound grenade is a CO2-powered sound distraction device After inserting a CO2 cartridge, simply pull the pin and lift the spoon; This will break the seal on the CO2 cartridge Once maximum capacity is reached the shell will rupture with an approximate 130db "BANG" Utilizing a single CO2 cartridge sold separately, the Valken Tactical Thunder B sound grenade is meant to stun or distract an unsuspecting opponent The empty shell immediately begins to fill with compressed CO2