7.62x51mm

The M118 Full Metal Jacket Armor-Piercing is a 7.62×51mm rifle cartridge commonly used in the United Nations Space Command's MA5 series of assault rifles.

Overview
The M118 FMJ-AP round is the standard-issue 7.62×51mm ammunition utilised by the UNSC Armed Forces, with other options including shredder rounds. Its armor-piercing properties stem from its specially hardened construction. During the Battle of Installation 04, it was commonly found in 120-round packs in the possession of dead Marines or stockpiled on the ground wherever UNSC forces were engaged with the Covenant.

The following weapons in UNSC usage are chambered for 7.62×51mm ammunition and typically make use of M118 FMJ-AP rounds;
 * MA5 series assault rifles
 * M392 and M395 Designated Marksman Rifles
 * M739 Light Machine Gun
 * M247 General Purpose Machine Gun and M247T Medium Machine Gun

Performance
Weapons chambered for 7.62×51mm ammunition such as the MA5B assault rifle are considered to be powerful by UNSC soldiers. UNSC infantry combat armor is capable of preventing lethal penetration at close range from a limited burst, though infantry and even light vehicles or aircraft such as un-shielded Covenant Banshees are susceptible to fatal damage under sustained, accurate fire. Energy shields drastically reduce the ammunition's stopping power, as a great deal of concentrated fire from multiple weapons - or an extended period of continuous automatic fire from a single weapon - is needed to overwhelm them.

Trivia
The 7.62x51mm cartridge is an actual cartridge, and is used in several NATO machine guns.

List of appearances

 * Halo: The Fall of Reach
 * Halo: Combat Evolved
 * Halo: The Flood
 * Halo: First Strike
 * i love bees
 * Halo: Ghosts of Onyx
 * Halo Graphic Novel
 * Breaking Quarantine
 * Halo: Uprising
 * Halo 3
 * Halo: Contact Harvest
 * Halo Wars
 * Halo: Helljumper
 * The Life
 * Halo 3: ODST
 * Sadie's Story
 * Halo: Blood Line
 * Halo: Evolutions - Essential Tales of the Halo Universe
 * Pariah
 * Dirt
 * Blunt Instruments
 * The Mona Lisa
 * Palace Hotel
 * Human Weakness
 * The Return


 * Halo Legends
 * Origins
 * Homecoming
 * Odd One Out
 * Prototype
 * The Babysitter
 * The Package
 * Remember Reach
 * Birth of a Spartan
 * Patrol
 * Deliver Hope
 * Halo: Reach
 * Halo: Fall of Reach
 * Boot Camp
 * Covenant
 * Invasion
 * Halo: Combat Evolved Anniversary
 * Terminals
 * The Commissioning
 * Halo: The Thursday War
 * Halo 4: Forward Unto Dawn
 * Scanned
 * Halo 4
 * Spartan Ops
 * Halo: Spartan Assault
 * Halo: Initiation
 * Halo: Escalation
 * Halo 2: Anniversary
 * Halo: Nightfall
 * Halo 5: Guardians