.....it could have been worse though:
"The GewehrgranatgerÀt ("rifle grenade device"), also called Schiessbecher ("firing cup"), of the Wehrmacht could be attached to the Mauser 98K rifle, the Gewehr 43, the StGw 44 assault rifle and the FG 42 paratrooper rifle."
from
http://technology.port5.com/kampfpistole.htm
thank god EA didn't think of an STG with this thing attached.....