From Halopedia, the Halo wiki
The M739 Light Machine Gun (M739 LMG) is a squad automatic weapon (SAW) used by the UNSC Armed Forces. Designed and manufactured by Misriah Armory, the M739 is used in protracted engagements where sustained or suppressive fire is required. The weapon is fed ammunition by a 72-round belt in a drum magazine.
SAWs increased in usage over the 22nd century during the first major colonial conflicts. In response, Misriah Armory began development of light machine guns that could serve in a SAW role. The M739 is the most recent addition to this, being introduced during the late years of the Insurrection, and continuing on into the Human-Covenant War. As of 2558, the UNSC continues to use the M739. It is classified as a Common REQ and can be summoned in Warzone at Level 4 energy.
Changes from Halo 4 to Halo 5: Guardians
Halo 5: Guardians REQ cards
List of appearances