my information is based on personal experience with 3 9mm ar15 mags, 1, 5.56 ar mag and 5 7.62x39 ar mags, all cprod and all fail to feed at at rate which make the gun unserviceable.
the x39 mags were made functional by adding stronger follower springs but the 9mm and 5.56 were just complete crap...
I will never buy another cprod mag as long as I live, which is one of the reasons I am not also pursuing an AR545 myself.
ignore my complete lack of capitalization. I still have no problem correcting your grammar.
I never said half the stuff people said I did-Albert Einstein
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