I just found this interesting piece of ordnance on the Eastern Front a few days ago. The question is what is it? One user suggests it's from the sdkfz 251 halftrack. I think it look a little too big though. Pic can be seen on page 6 in my digging thread of the sdkfz 251 halftrack with rockets.
Here it is. Sorry i forgot a to put something in for size comparison.