I noticed that the Orlite magazine is a constant curve design.
This was something of a Holy Grail item for the M16 which didn't end up working in Aluminum because several dimensions of the magazine well weren't critical and were, essentially, toleranced by other dimensions.
That meant that the constant curve magazines developed by Colt would work in most M16's, but not all of them. You can't issue that to troops and the "not all of them" is a large enough number that you can't do a recall of the guns that didn't work just so the magazine would fit.
So, we dealt with many iterations of the straight then curved 30-round USGI magazine with various followers to address the issues.
But back in 1982, Orlite Engineering took a crack at making a, not only, constant curve magazine that worked in the IDF's M16A1's, but also was made from polymer.
Sadly, they don't appear to have worked very well. Well enough to stay in production for ten years, but still...

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