Silver Shadow, an Israeli arms company has moved into new digs and will be introducing several new weapons in the near future:
According to Yuval Katz of Silver Shadow, the company will unveil a new series of Gilboa submachine guns in April 2013. The new series of assault rifles of different sizes and calibers will also include a 140 caliber integral silenced rifle, which was order for a special unit in Europe.Bullets alone would weigh .6 lb. minimum, so a 30 round mag full would tip the scales at 18 lb. OTOH with bullets that big, one mag should be plenty.