The Individual Combat Weapon System, Caliber 7.62 mm, MA5D, more commonly known as the MA5D Individual Combat Weapon System, MA5D ICWS, or simply as the MA5D assault rifle, was a selective-fire bullpup assault rifle used by the UNSC armed forces during the Human-Covenant War and following conflicts. In 2554, as part of post-war UNSC equipment consolidation efforts, the MA5D was adopted as the standard-issue service rifle of all branches of the UNSC military, and all other MA5 variants began to be phased out of service.