Nothing too complicated here. I wanted some big gunz for my developing grot army but wanted my own custom versions rather than the standard GW fare. So I thought I'd make some. Tricksy huh?
I wanted something which really exagerated the name "big gunz" too, since I'm trying to force a lot of extra character into my army. So I wanted to overemphasise the size, which should look great next to the grot loaders.