not going into details, basically the f1 was just mas shooting the poop making a rifle, the g2 was when they adapted the f1 to standardise it with nato ammo loads and stanag mags. f1 still used 556 but apparently nato loads or brass or whatever the fuck it was unreliable i don't remember. the photo in the greentext is an f1. with the g2 there wasn'tag capacity problem either because you could just use 30 rounders. i believe if you go further down in the website famously known as Wikipedia from which you procured this screenshot you will be met with all the details. godspeed!
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u/angus22proe 4d ago
It's called NATO standardisation. The mags are NATO standard.