The FN M249S is the semi-auto civilian version of the M249 SAW (Squad Automatic Weapon), one of the most recognizable light machine guns in US military service. Fires from belt or STANAG magazine. Type: Semi-Auto Rifle Action: Gas-Operated Caliber: 5.56x45mm Capacity: 30 Year introduced: 2016, Belgium Weight: 17 oz Overall length: 40.75" Status: Active Military use: Yes Intended use: Collector, Range Fun, Military Heritage