Just keep in mind that the M249 at squad level in the US Army is classed as an "automatic rifle" (see
FM 23-14 M249 LIGHT MACHINE GUN IN THE AUTOMATIC RIFLE ROLE), not as an LMG (though the manual itself admits that this was perhaps the manufacturer's intended role for the weapon). The M240B, consided by some to be an LMG is used as an LMG/MMG, but only at platoon level.