High Quality Content by WIKIPEDIA articles! A squad automatic weapon (SAW, also known as section automatic weapon or light support weapon) is a weapon used to give infantry squads or sections a portable source of automatic firepower. Weapons used in this role are selective-fire rifles, usually fitted with a bipod and heavier barrel to perform as Light machine guns. SAWs usually fire the same cartridge as the assault rifles or battle rifles carried by other members of the unit. This reduces logistical requirements by making it necessary to supply only one type of ammunition to a unit. SAWs are light enough to be operated by one man, as opposed to heavy machine guns such as the Browning M2, which fire more powerful cartridges but require a crew to operate at full effectiveness.