In international arms control, small arms are man-portable firearms that shoot kinetic projectiles, including handguns (revolvers and pistols) and individual-operated long guns such as rifles and carbines, shotguns, submachine guns, personal defense weapons, and light machine guns. Together with light weapons, which either are team-operated (e.g. heavy machine guns, portable anti-aircraft guns) or shoot explosive warheads (hand-held or underslung grenade launchers, recoilless rifles, rocket-propelled grenades, shoulder-launched missiles, portable anti-tank guns, anti-aircraft and anti-tank missile systems, mortars of caliber less than 100 mm), they comprise the Small Arms and Light Weapons (SALW) protocol.
According to the United Nations: "Since weapons in this class are capable of being carried, if a small arm, by one person or, if a light arm, by two or more people, a pack animal or a light vehicle, they allow for mobile operations where heavy mechanized and air forces are not available or are restricted in their capabilities owing to difficult mountain, jungle or urban terrain."