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14.5 mr556

  1. HK416 and HK417 HQ
    I am having some issues with my HK MR556 14.5 barrel conversion kit that I recently purchased from HKparts.net. Any help would be appreciated. I am having failure to feed issues. I can only get one to two shots off at a time. After every shot, I have to rack it before I can get the next...
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