Thanks for the info...
Problem I have, is I live in N.Y.C., Cheaper Than Dirt and Sportsman's Guide will not ship real steel mags to N.Y.C. address. Too many restrictions for New York City, i.e. won't ship any AR 15 parts of any kind, any mag(even though you allowed 10 rd mags in N.Y.C.), even laser sights or projected sight, etc. They rather aviod the whole problem, even if it is in legal limits.