In Battlefield: Bad Company, the XM312 is a mounted machine gun used by the United States Army. It is usually mounted on a tripod with a ballistic shield, and appears mostly in Conquest, making only a few rare appearances in Rush, where it is usually replaced by the KORD. It is also mounted on the HMMWV.
"Modern U.S. Military .50 caliber Machine Gun procured to replace the 80-year-old Browning .50 Caliber. The XM-312 is lightweight, highly mobile and offers little to no recoil. It is devastating Force Multiplier when deployed at squad level."
— In-game description.
In Battlefield: Bad Company 2, the XM312 is a usable mounted/stationary weapon. Its power per bullet and rate of fire make it an excellent anti-infantry weapon. It can also damage light vehicles, such as LAVs, boats and helicopters, though it will do significantly less damage with a multiplier of x0.15 against these vehicles. Players also need to lead their targets to compensate for distance. The XM312 is also mounted on the HMMWV 4WD as the vehicle's main turret, and on CAVs where it is usable by the 3rd passenger. The KORD is the Russian counterpart to the XM312; the two are only aesthetically different.
The XM312 fires very powerful rounds, and hence, can easily destroy light pieces of environment, such as trees and wooden structures, though it will do relatively little against sturdier targets, such as the ground, sandbags and walls.