I don't know what they did to achieve it, but my Vector shoots groups like you want. Nothing fantastic, but 3moa is pretty average. Maybe it's the barrel, maybe it's the fitting of parts (very tight for an AK), but they get it done.
High-quality brass-cased ammo helps a lot also. I like the Sellier & Belloit in the tan 20-round boxes. More expensive than Wolf, but a bargain considering the better quality.