六十年代,美海军急需一种近程高速的压制武器,达种武器用弹链供弹,由发射药产生的火药气体完成武器的自动循环,而不要外部能源。武器可以装在直升机、车辆、船只上,也可装在三脚架上供地面使用。接受研究任务的美海军军械站,决定搞一种发射40毫米榴弹的自动榴弹发射器。于是发 In the 1960s, the U.S. Navy urgently needed a kind of short-range and high-speed suppression weapon that could be bombarded by a bomb. The gunpowder gas generated by the propellant gun was used to complete the automatic circulation of weapons without any external energy source. Weapons can be mounted on helicopters, vehicles, boats, or on tripods for ground use. The U.S. Navy ordnance station, which was under study, decided to engage in a grenade launcher that would launch a 40mm grenade. So hair