I'm interested to clarify how these guns are setup in reference to the placement of the tank.
In this picture it looks as if a backwards s-rail style mount is being used.

While in this picture it appears that the max flo is directly mounted to the bottom of the grip frame in the now common fashion.

Yet both guns are set up with the gas through the grip feature. I'm just wondering how this is handled or if it's even going to be an option on the finished product.
BTW, that green is awesome.