I heard a radio interview a while back of the producer of 'The Unit', the tv show based upon delta force. In discussing yhe research that went into the development of the show, the producer indicated that, when the operators needed a knife for a mission, they went to the supermarket and bought one. Cheap, sharp, disposable. Not sure if this is accurate. Makes a certain amount of sense. Also makes all those combat knives that carry the delta/seal/sog label a marketing gimmick for exploitation of the wannabe market.