>>64151092
>It was obvious that the Red Army needed something that could bridge the gap between their shitty nuggets and PPS submachineguns for modern mechanized warfare.
The AK wasn't intended to bridge that gap, it was intended to replace the subguns entirely, the concept the Red Army had been moving towards was a "Universal Cartridge" where the M43 7.62x39mm would be shared between a rifle (SKS), a machinegun (RPD), and "subgun" (AK).
They moved away from this because they found that the AK wasn't just the superior new subgun, it was also the superior new rifle, so the SKS wasn't necessary anymore, and they felt (right or wrong), that the AK could also be a light machinegun with some tweaks, the RPK.
Obviously, you also need a proper GPMG as well as a form of DMR, which they also moved towards.
>>64159578
Battle rifles are strictly a neologism, but it's commonly used to describe full powered infantry rifles with self-loading actions. The Germans use the phrase "heavy assault rifles" to differentiate the FAL and G3 from intermediate cartridge assault rifles, and I think that sorta works, but it also excludes first generation battle rifles like the M1, SVT-40, G43, and so on.
Nonetheless, the G3 just isn't as good as an AK. It's decent, but the heavier ammo and recoil is a huge drawback, and the FAL just has a way better reload (better than the AK's, for that matter).
>>64159607
100%, it does pretty much the same thing (supersonic .300BLK is in fact extremely close to 7.92x33mm ballistics), but without being as needlessly tapered and fat assed. Better suited for suppressing, too.