The Demro XF7 Wasp is one of many iterations of the Demro Tac-1. It is a pistol caliber carbine. The Wasp features a folding stock. What is more interesting is that the Tac-1 is one of the few open bolt firearms grandfathered by the BATFE.
Last year Eric B. wrote an article on the Fox TAC-1 that had a 3 digit combination lock built into the frame. Click here to check it out.
Here is a video I found of a Wasp 9mm firing.