FN "right arm of the free world" FAL a "specialized role?"
Yeah, here's some "specialized" Jamaican soldiers, part of the elite battle rifle unit:
Only a few Jamaican soldiers get these FN FALs, the rest get Colt M4s
The FN FAL is
literally one of the most produced and most used
standard issue firearms in history. Certainly moreso than the Colt M4.
You clearly don't understand the intention of the battle rifle. Battle rifle's are not intermingled with assault rifles. I don't know of a single instance of this taking place. The closest instance I know of (keep in mind I don't know a hell of a lot) would be the United States in Vietnam when we were phasing out the M-14 (also a battle rifle using the same cartridge) in favor of the M-16, but we all know how that went. Assault rifles replace battle rifles in standard usage. It was in the US military, when we realized after the fact that we should throw a scope on top of our M-14s and call them DMRs for mid-range engagements that we put battle rifles back in use.
No sir, the FN FAL as with most battle rifles is for standard issue.
But anyway, regarding your mockup of a "modern warfare" squad, I would appreciate if you didn't speculate. If you want to make a mockup try and make it actually informed on how modern militaries actually structure their squads instead of how you think they do.