New Army "Caliber Configuration Study"

[JASmith]

Why don't we simply stay with Michael's definition :

...additional criteria that I think should be fairly widely accepted;

Light – Employed by single person (BAR, SAW, IAR)
Medium – Employed by a team (M1919, M60, M249G)
Heavy – Employed by a team, but due to system/ammo weight/bulk, normally fixed or vehicle mounted (M2, M1917, Mk19)

The only reason for not using this is if someone can dig up a current, authoritative Army Field Manual or Marine Corps equivalent that suggests a revision.