alternatehistory.com

During its development, the FAL was originally going to use an experimental intermediate cartridge called .280 British (7x43mm), but the U.S objected and insisted on the adoption of .30 caliber as the standard NATO rifle caliber. Thus the FAL had to be redesigned to be chambered in that caliber and became a battle rifle rather than an assault rifle.

But what if that weren't the case? What if the U.S decided to drop their near-religious obsession of power over portability then rather than later?
Would anything be different?
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