Well, I got a answer back from the company.
One question I had was about the stowage of the firearm in one version where the piece faces 180 degrees to the rear when stored under the stock.
This can be seen in one of the small pictures to the right in this page:
Zip Factory The Future of Fun
I was informed this was not a folding stock, but clipped to the "top ZiPPic rail" in a patent pending design, where it can be slid off the rail.
Also I had some questions of the legality of this arrangement or the arrangement some used where a ZIP was mounted under the barrel of an AR type rifle, wondering if this would affect BATFE legality. The company informed me the BATFE had signed off on this and was OK with it.
"We are selling ZiP as a Pistol which was determined and approved by BATFE. As such, when you attach to a rifle - its good on "over all length" but not on Barrel Length."
Much thanks to them for the answer to my mail, and their response to my questions.