Here's the review I did on the AK-74M. I used the CA 47 lows as well as Marui lows and Star 30 rnd. I did some play with it on the ferry in Mission, B.C. in March, with no gripes about fit, or feeding from any of those mags. At that time, I had 9 Marui, 2 CA, 10 Star and the 2 hi-caps that came with the gun.
I no longer have those mags or that gun, so I can't really update my info there.