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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 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 ...
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 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 ...
The MEI Hellhound 40 mm low-velocity multi-purpose grenade is a fixed-type munition designed to be fired from a 40×46mm grenade launcher such as the M79, M203, M320 (attached to the M16 series of rifles or M4 carbine), or Milkor MK-1. [1] [2] The round consists of a metal projectile body, a fuze, and a cartridge case assembly.