New Army "Caliber Configuration Study"

[JASmith]

...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)

Many thanks!

Those are very useful definitions, and now I know where the Dillon Gatling guns fit. I have been told by Dillon that the "water stream" of red from the tracers means that sights are rarely used, but the gun is almost always a vehicle or fixed mount, Arnold S. notwithstanding.