M247H machine gun

The M247H Heavy Machine Gun, abbreviated M247H HMG, is a heavy weapon used extensively by the United Nations Space Command ground forces.

Design details
The M247H is an air-cooled, gas-operated, electrically fired, linkless-fed weapon. It can be used in both anti-personnel and anti-vehicle roles.

Trivia

 * Judging by its designation and bulkier appearance, it is likely that the M247H is the heavy variant of the M247 General Purpose Machine Gun.
 * SPARTAN-II Jorge-052 utilized this weapon throughout the course of the Fall of Reach.