This is the best mounting solution for AKs. Most AKs have stamped sheet metal receivers that bend and flex. If you use a side rail mount, even a good one, you can push it with your hand and see its zero change because the receiver itself flexes. This mount, however, locks into the front trunnion and connects directly to the barrel. It holds zero almost as well as a bolt gun. Never ever buy a side mount if you plan to shoot your AK past 100 yards. Only buy this style of mount.
However, this mount requires some modifications to get it firmly attached to the trunnion. I had to add some washers to the inside and outside of the bolt. I also used washers as shims under the rearmost pin to get it level with the barrel before I tightened it down hard. Lastly, I used loctite on everything. Now, it's rock solid with zero play. I haven't shot it yet, but I expect it won't move.
I mounted this on a PSAK GF5. Results may vary for other brands.