I decided to try my hand at modding an AK mag to fit. My first attempt was with an unknown brand hi-cap. After literally 30 seconds with the dremmel it fit perfectly. To my surprise it also still worked in my CA 74, VFC 74U and VFC AIMS. So I decided to move on to one of my VFC mid-caps. Same result and they function flawlessly.
Nice fit
As you can see very little had to be done to make it work. Left is unaltered, right is modified.
The more and more I play with this gun, the more I love it. King Arms get top marks in my books for this weapon.