I'd suggest ProMag magazines. I have a Mini-30, and it's really hard finding magazines that actually work. So far, the best I have found (for me) were the ProMag 10-round mags. They work even better than the 5-round factory mags. There doesn't seem to be a big problem with the Mini-14 mags, but because of my experience (limited as it is) I'll stick with ProMag.