Hmmmmm......I'm glad to see the Fal made the list but I would like to see it a little higher.

SKS should be there, Stg 44 should not.
The M14 really is just a product improvement on the M1, and I believe it is a good one. Unfortunately it was sold a little too hard. IIRC it was touted as the ulimate solution to logistic issues for the following reasons.
1. Common ammo with the machine guns. (M60)
2. Larger magazine capacity.
3. Automatic fired allowd it to replace not only the M1 but also the BAR and SMG.
In reality it was only fit to replace the M1.
Also, IIRC, then orginal intent with full-auto capibility was increase the amount of supressing fire that could been generated while moving.
For those not familar with firearms and the tactics of that era, the name of the game was fire and maneuver. The enemy would be engaged, their postion would be "fixed" by fire, literally pouring enough fire onto them to make movement difficult, while another unit maneuvered into postion to destroy them. (This is a gross simplification of the tactic)
With full auto rifles a unit could more effectively "fix" a target for a short period.
Also, there was study conducted by the Army durring the Korean war that suggested a change of theory. Many soldiers would not fire until the enemy was within 200m.......might have been less than that. Combine that with human wave attacks and close in night fighting and you have even more reasons for full auto.
Having stated all of that, MBRs and ARs make poor LMGs, or SMGs for that matter.
Now when we start seeing more assault rifles that can fire a burst before the recoil impulse moves the barrel............