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Looks a little bulky to me. Also, a belt fed grenade launcher seems a bit much."
We already have one. The Mark 19. It is quite a bit much....especially if you are on the receiving end of a seven round burst.
It dont think it is designed to be a squad deployed weapon for infantry. Probably killer B's, helo and defensive position deployed.
As an aside, I heard an expert on Islam the other day state that we had MANY new weapons that have not been publicized (witness the drone bombing of the Al Queda) and that when we begin to see these weapons allowed to be made public, we would know that an attack on Iraq was near.
The second I saw your post that prediction came back to me.