I was looking for the calibers and such, and i do believe it was all one cross, the ammo is held behind the weapon. think about it this way, the cross is about 6 feet tall, so the gun barrel of the 7.62 machine gun takes up about two, the rocket takes up one foot, and the center part that links it all together about 6 inches. that leaves two and a half feet to hold ammo, about enough for a thousand rounds, in addition too the two extra rounds of rocket ammo, but the pistols take up relatively none of this space, beside the release mechanism. but since i don't want to have to make another Q, you can have it.
Edit: I believe there were two versions, but the second one had all of the features of the first, plus the gun and rocket. the first was kind of a stand in.