I guess I'm not much of a fan of completely out there what ifs. Why does it need 4 engines? To carry the weight of 1 extra gun? Why does it need 2 guns? A larger ammo store would have been a lot lighter. In what enviroment would this camoflage be intended to operate? It doesn't look functional to me.
Oh and the ammo drums on the real guns means they wouldn't fit there without much larger bulges on either side of the fuselage.