Izhmash AK-12 Variants
Interestingly enough, Izhmash somewhat followed the U.S. in their rifle manufacturing process for their primary caliber weapon types; 5.45x39mm and 7.62x39mm. You could say that the Russians followed the M-16A4 / M-4A1 / MK.18 CQBR family pattern with these weapons. The first three weapons in the first two photos illustrate a Rifle (AK-12), Sub-Carbine (AK-12 v2) and Carbine (AKU-12). I, personally, am loving the two carbine models of the 7.62x39mm AK-12.
The 7.62x39mm AK-12 seems to be the only one so far that has a light machine-gun variant in that of the RPK-12. It comes with an extended barrel, modified buttstock and drum magazine. Russia tried and failed to make a 5.45mm drum for the RPK-74 and RPK-74M in that of a "pancake" drum, but it never functioned properly. Quad-stack magazines are starting to come of use as a substitution.
Interestingly enough there are two different versions of the two offered 5.56mm NATO variant. The two seen in the bottom of photo-two are obviously more tailored to Russian specs, whereas the two in the top of the third photo could be export offers for the U.S. civilian market or ex-Warsaw Pact countries like Poland; which include extended magazine wells, modified gas blocks and muzzle devices.
The two remaining variants are that of the AK-12/76 12-gauge shotgun and a 7.62x51mm NATO / .308 Remington AK-12 DMR-type rifle. These latter two are coming to the United States for civilian sale.