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Cartridge, 40 mm, HE, M684
Регіон
United States
Категорія
Ammunition, Missiles and precision weapons
Armament High-velocity grenade launchers. Development By US Army Ordnance. Description This cartridge is a high-explosive round designed to inflict personnel casualties from air burst effect. This cartridge is a fixed round of ammunition consisting of a one-piece internally embossed steel body with a metal rotating band and a cartridge case containing the propelling charge and percussion primer. The projectile cavity contains a Composition A5 bursting charge. An electric proximity fuze is threaded into the front
opening of the projectile. The fuze assembly includes all-solid-state circuitry, liquid reserve power supply, electronic detonator, mechanical safety arming mechanism and an independent mechanical impact element. The projectile assembly is press-fitted into a cartridge case. The case is a hollow bi-chambered aluminium cylinder with an aluminium closing plug crimped into the open well of the propellant chamber in the cartridge base. The propelling charge is contained in the spherical high-pressure propellant chamber. This chamber has vent holes in the top and is sealed at the bottom by the closing plug. The hollow chamber in the upper section of the case acts as a low-pressure chamber. A percussion primer is crimped into the centre opening in the closing plug. Manufacturer US government contractors.