Heavy Tank for M.S.S.R. WIP

I've had this Batman toy tank for a while now are recently picked up another copy of it at a Big Lots.  It converts from a tank to a flying machine but oddly enough in tank form it has no weapons.  I've been looking for something to do to it for a while now when I spotted some toy military trucks at Dollar General with missile racks for only $3.00.  A little kit bashing later with some other bits from my bits box and this is what I came up with.  Fortunately I have enough bits to make the other tank as well.
We are going to use this tank for our Martian Soviet Socialist Republic force as a heavy fire support vehicle.  I just have a few more details and a paint job to add.