So I came up with this little bit of detail.
And of course you know the devil is in the details

I don't know if anyone has already designed this, so my apologies if someone has.

It's simply constructed. Just 4 1x3 black plates, 2 1x1 round black plates, and 1 1x1 black brick.
The round plates allow the straight plates to be angled in a flattened X pattern without going too far.
An optional 1x2 black plate can be attached to the back of the barrel and the barrel stand to keep the barrel from falling off the stand if you plan to do a lot of moving around.
--Anthony