you cant mount grenades launchers via RIS, or the rifle and GL de-attach (rather violently i hear)when you fire the GL
you need to have a bracket mounted to the gun e.g.
http://www.m203grip.com/0M4-M203-TacLight.JPG (see how even though it has RIS, its not mounted to it),
http://www.specops.pl/vortal/technik...G/AUG-M203.jpg
but fear not

i've been making a few designs
EDIT: the rear mount is designed for bigger scopes like night and thermal(doesnt sound COD-ish as they are real

heartbeat sensor anyone?) the big idea here is to give the AK the night abilities of blufor weapons in arrowhead
also been making the 3X sight model better and updating the AUG pack