I got a free 5-pack of "SigTac" 5.56 30rd polymer magazines when I bought my Tavor SAR about 9 years ago. These are Sig Sauer branded polymer 30-rd mags with green Magpul-style followers. Only markings on the relatively slab-sided black magazines are SIG SAUER and 5.56x45
It came in a clear black plastic box. No other part #s or markings.
I lost these for years until I found them in a corner. I could have sworn people said to avoid these magazines for whatever reason.
Does anyone know much about these? When I do a search for Sig 5.56 mags all I see are the PMAGs these days.
I found a review from 2014 https://www.gun-tests.com/uncategorized/ar-15-magazine-testing-price-has-little-to-do-with-quality-4/
that led me to this
https://www.lostcornerguns.com/in-store-items/in-store-magazines-3736/sig-sauer-mag55630blkply-magazine-556mm-30rd-black-polymer-3651183