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mutt

  1. Black Rifle Forum
    So here's the story - A couple of weeks ago I was t an outdoor range and trying to sight in one of my MUTT ARs. I was using Magpul 10 and 30 round Gen3 magazines and trying to shot 5 round groups. EVERYTIME I tried, ONLY the first round would fail to fire due to a light primer strike. I would...
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