The first Polymer framed commercially produced pistol, circa 1970. Lots of unique features (at the time) like a double action only trigger, 18rd magazine, and a weird front sight that used a polished sight face combined with a deep groove. The groove appeared as a shadow line against the polished area, giving the illusion of a narrow black front sight. The military version was capable of burst fire, the combo stock/holster assemby plugged into the back of the pistol and the burst limiter/selector mechanism was contained in the stock.
John Gardner had his version of James Bond carry one in the novel "For Special Services". People who have actually owned one generally liked them except for the 14lb trigger pull.