A noise generation device is taught which is used in conjunction with a shotgun generating a blast which has a) at least one chamber for receiving the blast from the barrel; b) a connecting bolts for joining the one chamber to the barrel; c) at least one exhaust port for venting the blast from the barrel; d) a channeling ramp for directing the blast towards the vent, and a blade and drive for pushing the device through a wall. It also includes various noise and blast generators which may be used to supplement the initial blast.