i had 2 friends who bought them new and had the same problems right out of the box. Most of one of the guns problems was the mags, but still had feeding issues. the other gun had a modification done to the feeding tube (filed down) where the mags go , and that Masada has worked fantastically without any problems. And both were the magpul acr's aswell. So i would look into that maybe. Those guns are built pretty well so im thinking it could be a small design flaw (such as feeding tube)
hope this helps
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