New Nambu M66The New Nambu M65/M66 is a Japanese submachine gun manufactured in 1965 by Shin-Chuō Koygo Industries.DesignThe New Nambu M66 is blowback operated, and fires from an open bolt. It fires the 9×19mm Parabellum round, from 30 round box magazines.AdoptionThe firearm was only tested and produced under trials for the considered replacement of the aging M3 submachine gun that was supplied by the United States Military during the formation of the National Police Reserve after the war.