MEI Mercury

The MEI Mercury is a family of medium-range low-impulse 40mm grenade developed by Martin Electronics, Inc. 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 [grenade launcher|M79], M203, M320, 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: 800 m
Muzzle velocity: 110 m/s

Covert infrared marker

IR footprint: 28'L × 5'W
IR viability: 15+ nm
Range: 650 m