HMG-38 heavy machine gun
From Halopedia, the Halo wiki
The HMG-38 Rifle is an older-model assault rifle and the precursor to the MA5B Assault Rifle. It was originally used by the Marines of the UNSC. As of 2525, these weapons were obsolete, however they entered the firearms smuggling black market. These weapons were used by the Eridanus Rebels. Template:WepList