Does anyone sell surplus parts kits with forged trunnions and bolt carriers? I've seen kits where you have to install the trunnion yourself, however you do that. I don't know anything about AKs, except that when people say they have AK-47 clones they aren't actually semi-auto copies of AK-47s, they're semi-auto copies of AKMs. Or so I've read. I wasn't around in the '40s when the AK-47 came out, or the '50s when the AKModernized came out either, but can't imagine why anyone would still be making the older design. Without seeing a Russian gun and American gun side by side, I can't compare anything at all except pictures and manufacturers' claims.
This "firearm" is the only AK-style 12 gauge I've seen in the firearm classification, so I still find it interesting. I'd rather have that than a tube-mag fed "firearm", and the only other one I've seen with a detachable box mag was a pump, which I wouldn't want.