MEI Mercury

Type of grenade

The MEI Mercury is a family of medium-range low-impulse 40mm grenade (40×46mmSR) developed by Martin Electronics, Inc. (MEI) that can reach out to 800 meters. The rounds are a fixed type ammunition designed to be fired from a 40 mm Grenade Launcher such as the M79, M203, M320 (attached to the M16 rifle or M4 carbine), or Milkor MK-1.

Technical information

High explosive dual purpose

  • Body material: Steel
  • Fuse: SF801/M550
  • Charge: 86g A5
  • Weapons: M79, M203, Milkor MK-1 launchers
  • Penetration: 90 mm mild steel at normal impact with anti-personnel fragmentation
  • Range: (max.) 800 m
  • Muzzle velocity: 110 m/s

Covert infrared marker

  • IR footprint: 28'L × 5'W
  • IR viability: 15+ nm
  • Range: (max.) 650 m

See also

  • MEI HELLHOUND
  • M32 Grenade Launcher (Milkor MGL)
  • M79 grenade launcher
  • China Lake NATIC (EX-41)
  • M203 grenade launcher
  • M320 grenade launcher
  • MK19
  • SAG-30
  • Martin Electronics, Inc. Home Page
  • Future Weapons: MEI Mercury 40MM Grenade
  • MEI Mercury 40 mm MV HEDP and MVT grenades (United States), 40 x 46-51 MV Grenades
  • Coming out of their shell
  • 40 mm Mercury Covert Infrared Marker
  • MEI product guide pdf