Do not, under any circumstances, attempt to launch something like a gas checked Mills bomb with a pyrotechnic blank! The grenade launching blanks illustrated by BadgerDog are charged with an approprite propellant, and are colour coded for easy identification. Noisemakers use blank powder, which is entirely different. Grenade launching was not limited to only the wire wrapped rifles. Until there was a change in tactics, and grenade launching fell from favour, any rifle could be used as circumstances permitted. The wire wrapping was applied to dedicated grenade launching rifles to contain fragments in the event of a barrel failure - with correct launching blanks. Incidentally, there was always the concern that the grenade might not launch correctly - it would start foreward far enough for the lever to detach, but not leave the launcher. The drill was to throw the rifle foreward, and get down. The delay in a standard igniter set for rifle launching provided enough of a margin to pitch the rifle.