the BT-42 was a swedish tank from WW2. it was made from stolen BT-7 light tanks and lend-lease 105mm howitzers from great brittain. it was a similair scenario to the sovjet KV-1/2 tanks, in that they took a basic tank, and gave it a huge turret to mount a very oversized gun.
btw if you want to have a laugh, search "BT-42 on crack" on youtube. ;)
this tank is gunless as-is but does have internal hovers already added to it. you can mount any weapon you want but i advice disintregrators for good firepower at all ranges and against any target.