7.62x51mm

The M118 Full Metal Jacket Armor-Piercing is a 7.62x51mm rifle cartridge commonly used in the UNSC Defense Force's MA5 Series of assault rifles.

Overview
The M118 FMJ-AP was originally developed by NATO in the late 20th century. Due to its reliability and heavy power, it is used with most common armaments in the UNSC Defense Force. It can be regularly found in packs littered around battlefields.

The following weapons are chambered with the M118 FMJ-AP:
 * MA5 Series
 * M392 and M395 Designated Marksman Rifle
 * M739 Light Machine Gun
 * M247 General Purpose Machine Gun and M247T Medium Machine Gun

Performance
The round is effective against infantry, especially against unarmored or unshielded opponents. Energy shields drastically reduce the effectiveness of this round, as it does not have enough kinetic energy to significantly drain the shields. The round is also largely ineffective against vehicles, as it is not significantly armor-piercing. Massed fire from a squad of infantry, however, is enough to drain shields and destroy or disable most vehicles short of tanks due to the sheer number of rounds fired. Thus, this is primarily an infantryman's round for use against other infantry.

Real world background
The 7.62x51mm NATO 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: Combat Evolved Anniversary
 * 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
 * The Commissioning
 * Halo: The Thursday War
 * Scanned
 * Halo 4: Forward Unto Dawn
 * Halo 4
 * Halo: Spartan Assault
 * Halo: Initiation