I got six of them from IWI. Steel body, small IWI stamp on the side. Green follower, different from my older surplus mags.
They lock into my InRange kit built ARM on a Tortort receiver without issue. No shooting function test yet but they seem nice.
ETA - To test below, I loaded up a handful of Magpul dummy rounds in one and it hand-cycled them okay. Maybe a CYA statement from IWI to head off if they don't work in non-ACE guns. Given the utter variation in quality in the Galil clone world, it's a smart move. They say they work in their ACE 21, then they don't have to deal with every unhappy dude rocking an ATI, Century, or ORF kit build with known dimensional issues. The ACE series is basically a Micro Galil receiver with window dressing, so I can't imagine they'd change it that much but who knows, wouldn't be the strangest thing anyone has done.