Is there a certain model of Magpul in 5.56 that is better than the others? I see them selling for about $15 at Cheaper Than Dirt. I had a plastic 30 round Thermold that came with my first AR and it caused my gun to jam at least once every time I used that magazine so I swore off plastics. I replaced the magazine with NHMTG’s and haven’t had a problem since.
Magpul has given the M16 platform another 30 years of service life.
Issued these pmag 30 maglevels right now and they work in my personal bushmasters, colts, S&W, SIG variants of the AR and a Hk 416 I use on occasion :o)
I also have the older Pmag 30’s without the “window” and they work well also . I shoot three gun as a hobby and use the same mags.
Some older plastic mags were crap as stated about the canooks issued mags back when ..... Whatever YOU buy, test, try and put a few back for 120 day plus rotation test for reliability.
Lots of gun gremlins can blame the magazines. Reliability recipe is key.
Stay safe !