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The United States Armed Forces has created a plethora of different types of 40 mm grenades in both the low-velocity 40×46 mm and high-velocity 40×53 mm calibers which uses what it calls a high-low propulsion system which keeps recoil forces within the boundaries of an infantry weapon. Presented on this page is a basic overview.
The high–low system (or high–low pressure system, high–low propulsion system, high–low projection system) is a design of cannon and anti-tank warfare launcher using a smaller high-pressure chamber to store propellant. It allows a much larger projectile to be launched without the heavy equipment usually needed for large caliber weapons.
40 mm high-velocity high-explosive dual-purpose M430A1 cartridge 40×53 mm high-velocity ammunition belt 40×53 mm HV ( high velocity ) [ 2 ] is a NATO-standard [ 3 ] high–low grenade launcher cartridge meant for mounted or crew-served automatic grenade launchers , such as the Mk.19 AGL , Mk 47 Striker , HK GMG , STK 40 AGL , and Daewoo K4 .
The M576 is a US Army designation for a 2.646 in (67.2 mm) long and 0.254 lb (0.12 kg) heavy US 40mm grenade buckshot load used in the M79, M203, M320, and M32 MGL grenade launchers. [1] It is olive drab with black markings.
The M203 is a single-shot 40 mm under-barrel grenade launcher designed to attach to a rifle. It uses the same rounds as the older stand-alone M79 break-action grenade launcher, which utilizes the high-low propulsion system to keep recoil forces low.
M320 Grenade Launcher Module (GLM) is the U.S. military's designation for a new single-shot 40 mm grenade launcher system to replace the M203 [4] [5] for the U.S. Army, while other services initially kept using the older M203. The M320 uses the same High-Low Propulsion System as the M203. The M320 can be mounted on the M16 series of rifles ...
In addition to being able to fire all NATO standard high-velocity 40mm rounds like the Mk 19 grenade launcher, it can fire MK285 smart grenades that can be programmed to air burst after a set distance. A computerized sight allows the user to set this distance.
The MK285 is an airburst grenade that can be fired from certain 40 mm belt-fed automatic grenade launchers. [1] [2] The grenade was designed for the Mk 47 Striker. [1] The Mk 47 is a candidate for replacing the Mk 19 grenade launcher, first fielded in 1968, and still in widespread service, around the world. The Mk 47 is considerably lighter ...