LMG or smaller is a holdover from the 2nd edition days where they used that term for firmpoints which are currently called a regular weapon mount (Rigger 2 131). I believe this was based on the fact that the Firearms skill at the time covered pistols, rifles, SMGs, LMGs, grenade launchers, and tasers. The skill for heavy weapons was Gunnery which covered machine guns, missile/rocket Launchers, assault cannons, and vehicle mounted weapon. That's what I'll use a cut-off since that's when they came up with the definition of what was lighter than an LMG since all of the weapon groupings have changed but they kept the phrase.
