FiveSeveN fails to cycle every first round

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Thread: FiveSeveN fails to cycle every first round

  1. #1
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    FiveSeveN fails to cycle every first round

    My fiveseven has stopped cycling the first round of every magazine. It doesn't even care how much I load the magazine up. 5 rounds, 6 rounds, 20 rounds. The first round doesn't cycle all the way and has almost no recoil. I manually cycle the action and it works normally for every other round. It even locks open. I am 100% puzzled. It's not like I do anything different when I manually cycle the action than when I initially chamber it. Any ideas?


  2. #2
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    hillbillyjim's Avatar
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    thats just weird I would call fn customer service
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    Lacquer buildup? have you tried cleaning the chamber with a brush and carb cleaner

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  5. #4
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    Really not much info, but this can happ if U have Carbon/Gunk build up in chamber, try taking a stiff wire bristle brush and some Hoppes No. 9 and hopefully that will solve issue!
    Best Wishes.
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    Here lies Lester Moore. Four slugs from a .44. No Les. No More.
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  6. #5
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    This issue is puzzling.

    Just failing on the first round and it's not dependent on how many rounds are in the magazine.

    This won't correct your issue but I'd try it with SS198 (Green Tip) ammo. The QA/QC OF SS197 (Blue Tip) and Federal American Eagle ​SUCKS!!!

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