I use Mec-Gar mags in a lot of different guns.
Some of my guns had their OEM mags made by Mec-Gar.
I've never had a Mec-Gar mag fail me. Ever.
I've never tried Promag. I don't know anyone who has had good luck with them, without having to modify them.
OEM, Mec-Gar, Chip McCormick, Thermold, and Magpul PMags have all been completely reliable in the weapons I've used them in.
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What would Jim Cirillo do?
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