The mac 10s 11s and tec 9s are always hit or miss no matter the manufacturer your best bet is to tweak the feed ramp a bit or extractor. Although the cobray mags are always faulty aswell
I’ve tried the Ruger, S&W and FN. As much as I love the FN I’ve gotta give it to the S&W. Doesn’t feel as good in the hand as the FN but it’s got a good trigger and is a great overall shooter.