In Dan Abenett 40k fluff, the AT-83 Brigand is one of many tank designs unique to the Urdeshi forgeworld in the Sabbat system. The Bloodpact are said to have many of these in service of their armies. Its briefly described as a heavy tank armed with a large artillery gun and sometimes sponsons carrying varying weapons. I bet it was used like a field support gun or anti-tank unit. I imagine it to look like this:
http://en.wikipedia.org/wiki/JagdtigerI have built my own variant of the AT-83 in the VDR template. A "Decimator Pattern" Brigand heavy tank. It is armed with a Volcano cannon, two heavy bolter sponsons and a pintle mounted heavy stubber. Since is a "heavy tank" like a Malcador I suppose and is not as big as a Baneblade I give it 2 structure points.
Here is a WIP picture of the tank with some Bloodpact:
And the finished tank:
And here is a picture of the Brigand working in its natural habitat!
Perfect for reducing enemy troops, armor and fortifications into bubbling slag!