Male squads, teams, and crews demonstrated better performance on 93 of 134 tasks evaluated (69 percent) than units with women in them. Male units were faster while completing tactical movements in combat situations, especially in units with large "crew-served" weapons such as heavy machine guns and mortars. Male infantry squads had better accuracy than squads with women in them, with "a notable difference between genders for every individual weapons system" used by infantry rifleman units. The M4 carbine, M27 infantry automatic rifle and M203 single-shot grenade launcher were assessed.