The Minimi and those nasty ass auto grenade launchers are not deployed in a 9-12 man squad. There needs to be a few
I'm guess your "nasty ass auto grenade launcher" would be a Mk 19. Are you volunteering to be the squad member that carries it? It only weighs 72 lbs, not counting cradle and tripod. Even the newer, much lighter Mk 47, which I saw used in Afghanistan, still weighs forty pounds.
I built my M4 into a own SDM-style rifle, with a 16" Stag upper and 1.5-4x scope because of the long potential shots in Afghanistan, but if you have the choice, engaging with crew-served weapons is the way to go. Horse Soldier, I'm curious where you get your figures about engagement ranges in Afghanistan? My fire base was always engaged from 500 meters or more out. Once when we returned fire, my gunner fired a literally 1 in a million shot, dropping a first round on the target in direct lay mode with a 120mm. He was using range data for 2200 meters...
John