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| {{Status|Canon}} | | {{Era|H1|H2|H3|HW|FOR|TF|GOO|UP|HGN}} |
| [[File:Ammo_-M41.png|thumb|50px|An M41 12.7×99 round from ''[[The Art of Halo 3]]''.]] | | {{Stub}} |
| The '''12.7×99mm Armor-Piercing''' is a round used in the [[M41 Vulcan|M41 Light Anti-Aircraft Gun]] that is mounted on the UNSC's [[M12 Warthog]] vehicle.
| | The ''12.7x99mm AP'', also known as the [http://en.wikipedia.org/wiki/.50_BMG .50 Browning Machine Gun'] [http://en.wikipedia.org/wiki/.50_BMG .50 BMG] and the [http://en.wikipedia.org/wiki/.50_BMG .50 caliber'] is a cartridge that first entered service in the early 20th Century. The round is based on a greatly scaled-up [http://en.wikipedia.org/wiki/.30-06 .30-06] cartridge. The cartridge itself has been made in many variants: multiple generations of [http://en.wikipedia.org/wiki/Ball_ammunition regular ball], [http://en.wikipedia.org/wiki/Tracer_ammunition tracer], [[armor piercing]], [http://en.wikipedia.org/wiki/Incendiary_ammunition incendiary], and [[saboted sub-caliber]] rounds. The rounds intended for [http://en.wikipedia.org/wiki/Machine_guns machine guns] are linked using [http://en.wikipedia.org/wiki/Ammunition_Belt metallic links]. |
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| == Background ==
| | A wide variety of ammunition is available, and the availability of match-grade ammunition has increased the usefulness of [http://en.wikipedia.org/wiki/.50_BMG#Partial_list_of_.50_BMG_weapons .50 caliber rifles] by allowing more accurate fire than lower quality rounds. |
| {{Wikipedia|.50 BMG}}
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| This round, also known as the .50 BMG, was first developed in the early 20th century for use in machine guns and heavy automatic weapons. It was an upscale of the .30-06 cartridge common to rifles of the time. The cartridge itself has been made in many variants. The rounds intended for machine guns are linked using metallic links. It was later refined for use in sniper rifle systems, setting several distance records for sniper kills. In this role, it was mainly used as an anti-matériel round.
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| == Overview ==
| | The [[M41-Light Anti-Aircraft Gun]] utilizes the 12.7x99mm Armor Piercing Rounds. The [[M6D Personal Defense Weapon System]] pistol uses 12.7mm .50 caliber semi-armor-piercing high-explosive rounds. |
| It is effective against both vehicles and infantry, regardless of shielding. Its armor-piercing nature is the reason for its effectiveness against vehicles; [[Armor-piercing round|armor piercing rounds]] are designed to shoot through armor to damage the occupants of the vehicle. While unshielded infantry are easily killed, [[energy shield]]ing defeats most of the armor-piercing benefits of this round. However, it is still effective due to its large size and high kinetic energy. Only the [[SRS99 series]] of sniper rifle uses a [[14.5×114mm|larger round]].
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| This round should not be confused with the [[M225 Semi-Armor-Piercing High-Explosive|M225 SAP-HE]] rounds that are used with the [[M6 Series]] pistol. The pistol rounds are smaller, with less powder and thus lower muzzle velocity and kinetic energy. They also operate on a different system, mixing both armor-piercing and high-explosive properties. This round is not high-explosive.
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| {{Ammunition}}
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