Well, I've seen it all now.. I was looking for some info on the M240 and found the Israeli Special Forces web site, so I stared poking around and guess what I found?
The have a sawed off CAR15 matched up with a M203 grenade launcher.
If this is not a hack job I don't know what is, check it out here.
It almost looks like they did the conversion in field, rough mod of the CAR15 man. As long as it's functional I guess it does not matter how it looks :-)