DoubleTapper recently attended the ISDEF 2010 expo in Israel. One of the guns he saw there was the Gilboa, which made by the Israeli firm Silver Shadow Advanced Security System Ltd. This full-auto AR-15 style weapon has just about all the features you could want from a PDW. The barrel can be as short as 4.5″, a side folding stock attaches to the rear picatinny rail and the charging handle is on the correct (left) side .
More information and photos on this firearm at DoubleTapper.
[ Many thanks to DoubleTapper for letting me use the photos. ]