Small Arms and Light Weapons (SALW) is a term used in arms control protocols to refer to two main classes of weapons:
The U.S. Army defines small arms/light weapons (SA/LW) as: "Handguns, shoulder-fired weapons, light automatic weapons up to and including 12.7mm machine guns, recoilless rifles up to and including 106mm, mortars up to and including 81mm, man-portable rocket launchers, rifle-/shoulder-fired grenade launchers, and individually operated weapons that are portable or can be fired without special mounts or firing devices and that have potential use in civil disturbances and are vulnerable to theft."
According to the United Nations Office on Drugs and Crime, the international framework on firearms is composed of three main instruments: the , the United Nations Programme of Action to Prevent, Combat and Eradicate the Illicit Trade in Small Arms and Light Weapons in All Its Aspects (Programme of Action, or PoA) and the International Instrument to Enable States to Identify and Trace, in a Timely and Reliable Manner, Illicit Small Arms and Light Weapons (International Tracing Instrument, or ITI), where only the Firearms Protocol is legally binding.
The ITI, adopted by the United Nations General Assembly on 8 December 2005, defines small arms and light weapons as:
any man-portable lethal weapon that expels or launches, is designed to expel or launch, or may be readily converted to expel or launch a shot, bullet or projectile by the action of an explosive, excluding antique small arms and light weapons or their replicas. Antique small arms and light weapons and their replicas will be defined in accordance with domestic law. In no case will antique small arms and light weapons include those manufactured after 1899:
(a) “Small arms” are, broadly speaking, weapons designed for individual use. They include, inter alia, revolvers and self-loading pistols, rifles and carbines, sub-machine guns, assault rifles and light machine guns;
(b) “Light weapons” are, broadly speaking, weapons designed for use by two or three persons serving as a crew, although some may be carried and used by a single person. They include, inter alia, general purpose or universal machine guns, medium machine guns, heavy machine guns, rifle grenades, under-barrel grenade launchers and mounted grenade launchers, portable anti-aircraft guns, portable anti-tank guns, recoilless rifles, man portable launchers of anti-tank missile and rocket systems, man portable launchers of anti-aircraft missile systems, and mortars of a calibre of less than 100 millimetres.