Hawk MM-1

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The MM-1 is a 40x46mm semi-automatic grenade launcher manufactured during the 1980s in the United States by the Hawk Engineering Company from Lake Bluff, Illinois. The Hawk MM-1 was adapted from the Manville machine projector, a revolver-type 18-shot tear gas gun, developed in USA for police use before the Second World War. Michael Rogak upsized the Manville design to 40mm and made certain design changes. One innovation was Rogak's development of a button rifling procedure for the aluminum barrel. This increased the speed of production while reducing costs. Subsequently, Rogak and a few others formed Hawk Engineering and began production of the MM-1. The MM-1 is a revolver-type weapon, with the heavy cylinder being rotated for each shot by the clockwork-type spring. The cylinder could hold up to 12 rounds. The spring is wound manually during the reloading. It can accept any 40 mm grenade of up to 101 mm length.