The M739C Ultra Light Machine Gun is the UNSC's lightened LMG, giving units a lighter and adaptable light support weapon, when the M122 is too large and heavy. This allows squad based units to produce triple their normal amount of firepower against infantry targets. The weapon features a extremely light polymer body with heat-resistant metal alloy components, meaning the M739C requires neither mid-battle barrel changes nor maintenance, allowing for rapid, uninterrupted fire for long periods, though due to lack of thermal transfer systems and need for air cooling it does have to pause due to the firing mechanism heating up from heat run off and could potentially cook off the magazine, though the gun fits a inbuilt gauge linking to the operators HUD that allows them to halt before critical t