Center Balanced Systems have updated their AK-style Draco Pistol from a conventional pistol design (in this case a stockless short barreled rifle) to a bullpup design. According to them the BATFE have stated that the new design is a pistol, not a short barreled rifle, and therefor does not fall under the NFA.
Just looking at it I cannot believe how the BATFE came to that conclusion. If it does not have a stock then I obviously do not know what a stock is. Center Balanced Systems have hacked the NFA to a greater degree than Franklin Armory with their Franklin Armory XO-26b.
If you buy this gun make sure you get a copy of the BATFE letter approving the design.
[ Many thanks to Jeff for emailing us the link. ]