Do you mean PMI? I forget what it stood for -- Precision something. They are out of business (not that it would help a lot if they were still in business). PMI mags are at the top of the heap for aftermarket mags, along with Thermolds and Masens. However, it depends who you talk to -- I had bad experiences with Thermolds in Minis, but others love 'em. I've only heard one complaint about the PMIs, and that was from a fellow who owns and shoots AC556s -- the Masens apparently do better on full-auto fire. There is a mag FAQ on the Mini-14 list page at egroups.com.