The M249 is a light machine gun used by the United States military and other armed forces around the world. It is designed to provide sustained fire support and is capable of firing 5.56×45mm NATO ammunition. The M249 can be operated in both automatic and semi-automatic modes, making it versatile for various combat situations. This weapon is often used in infantry squads to enhance firepower and is typically fed by a belt of ammunition or magazines. The M249 is known for its reliability and effectiveness in providing suppressive fire, which helps protect troops during engagements.