I should've been more specific.
If you scroll down on this link:
http://www.inert-ord.net/ger03a/gerr...her/index.html , you'll see the special wooden bullet grenade launching rounds, quite similar to the WWI era US rounds for launching VB rifle grenades.
Unfortunately I don't have any info on how many per squad or platoon, or that of the various other infantry launchers the Germans developed. Hopefully someone else can help you there.