MEI Mercury

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.

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