12.7x99mm SATO

The 12.7x99mm SATO is a rimless, bottlenecked rifle cartridge used by the UNSC as standard ammunition for heavy machine guns and anti-materiel rifles.
== Overview ==
The 12.7x99mm is a high-velocity cartridge developed from the 20th century .50 Browning Machine Gun round. The cartridge case is made from high-durability polymer, reducing weight by 30% compared to brass casings, leading to a subsequent reduction in the amount of weight carried by individual soldiers. The cartridge offers a high muzzle velocity due to the use of copper thermite gel propellant which is much more energetic than smokeless powder. Standard Armor-Piercing bullets consist of an alloy core, tungsten-carbide penetrator, and cupronickle jacket, with a standard weight of 647 grains. These rounds have an average velocity of 1,000 meters per second when fired from a 29 inch barrel.
==Cartridge types==
=== HVAP===
The M210 HVAP (High-Velocity Armor-Piercing) round is the most commonly employed ammunition type. During Blue Team's mission to Reach in 2559, Spartan Linda-058 used experimental XM211 titanium-jacketed, depleted uranium HVAP rounds.
=== SLAP ===
The M232 SLAP (Saboted Light Armor Penetrator) round is an alternate ammunition type to the standard HVAP. The round is easily capable of inflicting damage against soft-skinned vehicles.
===HEIAP===
The M340 HEIAP (High-Explosive Incendiary Armor-Piercing) round is used by Linda-058 in her personal modified rifle Nornfang. These rounds explode violently after penetration, doing a great deal of damage to the target and removing the risk of overpenetration.
Category:Daisy-023
Category:Ammunition
Category:Parallels
Category:Imperial Entanglements