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 7.62x51mm ammunition utilised by the the UNSC Armed Forces, with other options including 7.62x51mm shredder rounds. Its armor-penetrative properties stem from its specially hardened construction. It can be regularly found in 120-round packs wherever UNSC forces utilising MA5 series rifles are engaged.

The following weapons in UNSC usage are chambered for 7.62x51mm 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 7.62x51mm 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 Covenant Banshees are easily 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 utilising this round.

Real world background
The 7.62×51mm NATO round was originally developed by NATO, a military alliance between national governments, in the middle of the 20th century. It was developed to be reliable when used in fully automatic weapons, to have a large punch, and to standardize service rifle calibers between governments, in order to improve logistics. It replaced a variety of smaller ammunition and largely achieved the goals of development.

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