A Ranger with the 75th Ranger Regiment peers through night vision goggles while manning a M249 SAW machine gun.
The M249 is 5.56mmx45mm belt-fed light machine gun.
The 75th Rangers have employed various variants of the M249, including the SPW and MK46 Mod 0 / Mod 1 variants which were designed for special operations forces.
The M249 is carried by the automatic rifleman in a 4-man Ranger fireteam, who uses the weapon to suppress enemy positions.
more info: M249 SAW